I'm not arguing about bans and unbans in particular, just about the phenomenon that is being observed. This is what I have to say about unbanning things like SFM, birthing pod, GSZ, twin, Dark Depths, jitte, etc.:Quote from idSurge »Ashiok, thats totally fine, and I think we have touched on this before with the 'free wins' topic.
If that is the case (and I do think you are right) then just unban Twin. If these linear decks are the easiest/most effective way forward, how is it wrong to release a card that does punish them?
Banned cards are banned because they make a particular strategy too powerful, and make the format unbalanced. What I'm arguing in my previous posts is that, in a balanced format, you should expect to see linear decks taking the cake at big events. You may want to unban particular cards to give a greater edge to "fair" decks. However, what happens afterwards? Are they going to keep in check just the linear strategies? Twin was powerful because it was a fair deck that had a combo out. It can certainly tangle with fair decks. What if you release twin into the wild and the meta becomes unbalanced again?
Now, I'm not saying that is what is going to happen, neither for twin nor for SFM or other particular cards in the banlist. That said, I can understand if WoTC doesn't want risk that happening with their current best format for showcasing competitive play. The only way to safely know the effects of such unbans is with lots of playtesting, which is a thing I'm not sure they're willing or have the resources to pursue.