EX Moves giving projectile invincibility is a huge part of why I dislike SFIV.
Do you mean that those EX Moves are bad for the fireball game?
I don't think it will make that much difference compared to SFV, considering a lot of the cast has ways around them. At least against shotos. Laura, Charlie and Dhalsim are less affected by those.
Also I nearly forgot, Chuns fireballs go fullscreen when in V-Trigger. Is that a new buff?