There are ambiguous set ups, and they are character and screen specific, but in no way, shape, or form are they comparable to Batgirl's superficial 50/50 mix ups. Batgirl's mix ups do not exist in Street Fighter. If they had existed, they would have been patched out of the game in the beta.You undertstand that, while delayed wakeup limited the effectiveness of some setups, there are still plenty of usable ambigious setups in the game, right? There are plenty of subtleties, but there are also some setups that are flat-out visually ambiguous as to which side they'll land on, and have nothing to do with option selects.
Street Fighter does not revolve around the vortex any more. If you watch players like Daigo, Momochi, and Tokido player, the game is about footsies and grounded damage.