The pun is mightier than the word after all.
Its only a pun (or paronomasia) if done deliberately. Malapropism is for the people who do it accidently. Thus it takes "F" fort to make a pun fun.sweet, it's so hard to find people who make puns (on purpose, not accidentally)
Gideon builds fast and comes into play early, those are two things good walkers do and he does better than any walker in standard currently. His only weaknesses (a big one) is he can't defend himself from creatures, but he still can become indestructible and can prevent damage to himself. I'd play him in bant control or fog/stall deck over the current standard Jaces.
Control is getting Blind Obediance. I expect white blue to be very strong because of the good Dimir and Orzhov cards coming out.
4WB is not that bad for what this card does. You only run one or two of this sweeper in your sideboard at most. Its a sweeper you can side in against mid-range, tokens, and even control. You will have at least 6 sweepers against aggro, and this may not be better than Terminus is for the aggro application, but its not bad either.
Plus the format seems to be slowing down with the great control options this block is getting, a trend that I expect to continue as more cards like Aetherize are revealed.
Merciless Eviction. Good card, less options, stronger effect, color intensive...maybe, but you really shouldn't have issues doing multicolor in a multi color set
Also Planar Cleansing can get pretty broken with his +0
Where the bad design comes in, is his -15. If I have an an indestructible 10/10 I hope I'm winning in control. There was no need and seems like some fanboy added that last minute. Also makes Gideon seem likes hes overpowered roleplaying wise. Gideon shouldn't have magic or abilities stronger than Bolas. You know?
I think your playing it wrong then. You don't have to wipe all their creatures off the board, only the annoying ones that are able to kill a 5/6 angel. The other cards would be fetched from your graveyard giving you CA over your opponent.
Not to mention tempo this large is doing something when it hits play. The cards are sent back to the opponents hand, not back into play, so your definitely slowing them down for quite a while. 6 toughness is nothing to sneeze at so its possible it can stay on the board a while too.
Reaching the second angel makes this card a lot better though. Not only all that but this has flying. I'd rather have flying over vigilance in control, especially when it has a leaves the battlefield clause.
Also this card isn't legendary, which is pretty nice.
You really don't need to go that far. Snapcaster mage will keep it locked long enough. I guess its obvious but I forgot to mention this is like having creature removal as well should you keep it on the board or have on in your hand.