• Scattered Groves replaces Temple Garden
• Ash Barrens replaces Safewright Quest
• Jade Mage replaces Selesnya Guildmage
The +1/+1 mode just isn't as good when the core creatures are growing to be more spread out. Repeatable 1/1 chump blockers is the most appealing part of this and doubling at 6 and 9 being achievable makes this a good swap.
• Gnarlwood Dryad replaces Death-Hood Cobra
With multiplayer, this is attacking less, so having to hold up mana for deathtouch makes the snake pretty bad, even if it can block fliers. This one turns into a threat when drawn late to help end games.
• Deathcap Cultivator replaces Avacyn's Pilgrim
This solves the problem of bad mana dorks. In smaller settings, 1/1 bodies can be made relevant fairly easily. This setting needs more longevity when flooding out late. Deathtouch is natural even if this change prevents the deck from moonlighting as a commander deck.
• Clear Shot replaces Dromoka's Command
This is a questionable change, but it makes it harder for this to 2-for-1 combat tricks, allows it to BE a combat trick, and allows deathtouch creatures to damage big creatures without dying. The blow out scenario is also lessened with awkward interactions with removing aura-based removal in combat.
• Choking Restraints replaces Contagion Glasp
This interacts with a slightly different set of threats. Instead of being expensive and targeting utility creatures, it's cheap, and stops big creatures before being a mana sink to deal with creatures with abilities late.
• Provoke replaces Detainment Spell
Doesn't answer threats as easily, but allows social play and deals with utility creatures with no card cost.
• Blessed Alliance replaces Martial Law
This interacts with a slightly different set of threats but does untap creatures tapped down by tappers. Detain is awkward and was ultimately just a 1 for 1.
• Faith Unbroken replaces Vow of Duty
This has better gameplay as the vow typically clogged the board and didn't answer utility creatures. This cleans up utility creatures decently, especially those that accrue value over time.
• Elder of Laurels replaces Seedcradle Witch
This is less-dependent on the ability to ward off early plays and is less of an oppressive ability.
• Unstable Obelisk replaces Selesnya Keyrune
This is more tension and ramp-desiring / pay off. This may be less useful midgame though. This is one of the few remaining ways of getting an aura off your big threat.
• Become Immense replaces Beast Within
This targets combat rather than being efficient, flexible removal. This slot no longer destroys auras and doesn't leave behind a 3/3 token to be dealt with.
• Prepare // Fight replaces Test of Faith
Untap combat trick has more play to it than a flash aura that eats deathtouchers.
• Ainok Bond-Kin replaces Phyrexian Revoker
Early game 2/1s are just bad now and utility creatures are less important than in 1v1
• Heliod's Emissary replaces Wiltleaf Cavaliers
Aggro needs a bit more assist than beefy vigilance. This is now a mana sink and adds to delirium
• Benevolent Offering replaces Briarhorn
Testing out flying tokens and life gain. Might be too much of a liability, but Briarhorn was always too much of a blow out.
• Dragonscale General replaces Auriok Bladewarden
Trying something new.
• Sentinel of the Eternal Watch replaces Coalition Honor Guard
Flagbearers are significantly more awkward in multiplayer where they prevent opponents from killing each other's creatures.
• Conifer Strider replaces Acidic Slime
• Domesticated Hydra replaces Kavu Primarch
Golgari Decoy is now on the watch list because there are very few things it can actually interact against in a satisfying way compared to before. I think there are fewer permanent buffs it can acquire but it still may have enough buffs for it to be usable.
The Regrowth is never bad, efficiency aside, which bothers me in terms of balance of power between colors, though one could argue that green is the color that does lands / finding lands the best so its flippy lands should be better and I suppose I could buy that argument on some level.
This can easily slot into a land slot without slowing you down and the life payment is negligible in commander both with higher starting life and white's natural incidental lifegain such that this can give you a small bit of flood protection late in the game when you topdeck it. But two 4/4 angels are nearly irrelevant in the larger scheme of what happens commander.
As an instant it could have protected creatures from a board wipe and created surprise blockers/attackers without having to tap out.
As a cheaper spell that scaled with opponents, it could have been more efficient in a format where white already has trouble ramping.
Having the basic type plains, it could have had synergy with the original Emeria.
I would have rather seen expensive versions of Ghostway, Second Sunrise, or Breath of Life in this slot.
It feels crazy that the green uncommon Recover land feels more usable/useful than this mythic despite this ostensibly slotting into decks with less disruption. As a land slot, you can't even get it back with Sun Titan or enable other non-basic lands that are checking for basics / basic types.
And coming from Empyrial Storm, I remain frustrated that white gets these clunky 4/4 tokens when the blue one copied artifacts, the red one copied spells, and the green one was effectively a polymorph. I want my cards to do interesting things.
But yes. I'm sure that standard / arena players will be able to use 8 power for 7 from a land slot just fine.