Hey kcovey - yeah, I hear you! We actually do have a "Synchronous mode" that we've played with internally. It changes the mechanics a bit: you see your opponent's moves play out in realtime, of course; but more interestingly, there's a turn timer (similar to Hearthstone), which puts a new twist on the core gameplay, as you really have to think on your feet.
From a business perspective, there are a couple things that give me pause about shipping with this mode. First, the game needs a much larger pool of active players in order to have automatching work well. If you hit the "Quick Match" button and you don't get an async game immediately, that's no big deal -- that suits the pacing of async games. But if you're trying to play a realtime match and it takes several minutes to find an opponent, you -- the proverbial you, i.e. most players -- are likely to just bail.
The second concern is a bit smaller, and has to do with mobile devices. Antihero will ship on tablets on phones several months after the PC version is complete, and async just makes so much sense on those devices. That said, Hearthstone has definitely demonstrated that large numbers of players are willing to do synchronous play from their iPhones and iPads... but Hearthstone has Blizzard behind it :).
Anyway, it's not an either-or thing. The game will definitely ship with the existing async mode, and it may _also_ ship with the synchronous mode; we just need to figure out what the best player experience will be.
ALL THAT SAID, the current plan is to release an update with Synchronous mode enabled - soon - and gather feedback from players! Hopefully this will happen in the next week or so.