My guess is that 3 months from now, they'll have something else that they need to ban. I think they're still missing too many things to have a healthy format. If I had to pick a card now that I think will get the axe, I'd probably say
Mox Opal. Affinity can be too fast for existing hate. Ancient Grudge is great and all, but if you're Grudging the same turn a lethal Atog is coming your way, it's a bit late. Sorry Abe, but Dark Confidant doesn't see play in Modern and will not see play in Modern any time in the next year. The format is too suicidal with the available mana bases and without Top or even Brainstorm to help avoid damage, Bob is just not good enough. The format isn't about incremental advantage, it's about maximum tempo advantage. I could see Gifts banned, not because it deserves it, but hey, they banned Punishing Fire, Jace TMS and Bitterblossom. At this point, I could see them banning anything that even smells of control.