Midnight Reveries, this list is so close to my list; its great having another with a similar build which I have worked on for a long time as well; I am new to the forum though definitely as you, not new to knights and have been working on my list for a long while.
The main differences between our lists is in a couple of creature choices and most of the non-creature "support" cards. The main problem I see with both my list and yours is how tight the non-creature slot is - having creatures that live forever is fun & a definite strength we can utilize but they lack interaction with your opponent as you would have in other modern decks for instance many humans lists, also needing ways of play Haakon involves using the non-creature slots to get him into play by either discard or "cheating" him in. I think this is in part why Liliana is so effective as it fills three roles - it is removal when you need it, hand disruption when you need it, and a discard outlet for Haakon. For similar reasons I run collective brutality - it is a discard outlet for Haakon, creature removal and hand disruption - however with post-unbannings (as you eluded to) there are many more higher P/T creatures to deal with it less universal though I find it still quite effective as it utilizes that treasured slot so well. To explain the reasoning for some of my other non-creature slot choices I think talking about its strengths and weaknesses critical.
Strengths of the deck: Resiliency, you either have indestructability or can recast things from the graveyard. Mid game is typically yours if you survive long enough. Aka it is VERY difficult to get rid of your creatures once you get enough momentum.
Weaknesses: Quick early game decks that get under you before you can gain momentum, and combo decks. Internally is the over-extended mana base...
To combat the weaknesses and take advantage of the strengths I have played several different non-creature cards c varying success:
1) Day of Judgement: A two edged sword that you can mitigate your losses through out "indestructible" creatures - exemplar, dauntless bodyguard and knight of holy nimbus - early decks tap out earlygame when you would cast day of judgement thus 99% of the time allowing them to live). I do find having 1-2x sideboard helps but only affects decks trying to go under you.
2) Worship: A much more versatile card as it hits early game and combo decks. I currently running 2x mainboard which might be a bit much as of now... Basically with all your indestructability with your creatures and bring them back from the dead with Haakon its very difficult to deal with unless you have enchantment removal (again a plus of Collective Brutatility to ensure keeping your worship alive).
3) Chalice of the Void: This one hits both combo and early decks. MOST of your cards cast 2+ mana and 90% of the time you cast Chalice on 1 thus is extremely efficient, furthermore you have access to Cavern of Souls via Knight of Reliquary and if you have dropped an early Aether Vial that helps as well get around dead draws to chalice when you need it. I LOVE THIS CARD, pre-unbannings I mainboarded 4x, post-unbannings I haven't played around enough yet to decide if sideboard vs mainboard.
Another card to consider adding in the land base is Geier Reach Sanitarium which gives you a discard outlet for Haakon, or if you have Haakon essentially nets you 1 card! Colorless lands are very difficult to include due to the already tight restriction Liliana, Haakon, Knight of Holy Nimbus & Orchid put on your manabase in addition to adding green to the mix for Co-Co, Reliquary & Valeron.
Anyways those are my thoughts from my decklist which is very similar to yours, any thoughts/criticisms are welcome
How have the bitterblossom worked out for you?
I have been considering dropping 1x lingering souls and adding in 2x bitterblossoms having a 3/2 split on lingering/BB
The main differences between our lists is in a couple of creature choices and most of the non-creature "support" cards. The main problem I see with both my list and yours is how tight the non-creature slot is - having creatures that live forever is fun & a definite strength we can utilize but they lack interaction with your opponent as you would have in other modern decks for instance many humans lists, also needing ways of play Haakon involves using the non-creature slots to get him into play by either discard or "cheating" him in. I think this is in part why Liliana is so effective as it fills three roles - it is removal when you need it, hand disruption when you need it, and a discard outlet for Haakon. For similar reasons I run collective brutality - it is a discard outlet for Haakon, creature removal and hand disruption - however with post-unbannings (as you eluded to) there are many more higher P/T creatures to deal with it less universal though I find it still quite effective as it utilizes that treasured slot so well. To explain the reasoning for some of my other non-creature slot choices I think talking about its strengths and weaknesses critical.
Strengths of the deck: Resiliency, you either have indestructability or can recast things from the graveyard. Mid game is typically yours if you survive long enough. Aka it is VERY difficult to get rid of your creatures once you get enough momentum.
Weaknesses: Quick early game decks that get under you before you can gain momentum, and combo decks. Internally is the over-extended mana base...
To combat the weaknesses and take advantage of the strengths I have played several different non-creature cards c varying success:
1) Day of Judgement: A two edged sword that you can mitigate your losses through out "indestructible" creatures - exemplar, dauntless bodyguard and knight of holy nimbus - early decks tap out earlygame when you would cast day of judgement thus 99% of the time allowing them to live). I do find having 1-2x sideboard helps but only affects decks trying to go under you.
2) Worship: A much more versatile card as it hits early game and combo decks. I currently running 2x mainboard which might be a bit much as of now... Basically with all your indestructability with your creatures and bring them back from the dead with Haakon its very difficult to deal with unless you have enchantment removal (again a plus of Collective Brutatility to ensure keeping your worship alive).
3) Chalice of the Void: This one hits both combo and early decks. MOST of your cards cast 2+ mana and 90% of the time you cast Chalice on 1 thus is extremely efficient, furthermore you have access to Cavern of Souls via Knight of Reliquary and if you have dropped an early Aether Vial that helps as well get around dead draws to chalice when you need it. I LOVE THIS CARD, pre-unbannings I mainboarded 4x, post-unbannings I haven't played around enough yet to decide if sideboard vs mainboard.
Another card to consider adding in the land base is Geier Reach Sanitarium which gives you a discard outlet for Haakon, or if you have Haakon essentially nets you 1 card!
Anyways those are my thoughts from my decklist which is very similar to yours, any thoughts/criticisms are welcome