Whiffing was not fixed, but I have a more accurate explanation of it, and they're related.
Cervantes, Nightmare and Siegfried have large hit boxes that deal with collision, such that if you're standing next to them, you'll get pushed back just out of throw range if they block. If you do 6B+G or 6A+G, you WILL throw them if they block, because you're temporarily inside of their collision hitbox and thus in throw range.
This could be fixed by increasing Apprentice's throw range just a little, meaning he probably has the shortest throw range in the game right now.
Amy, Apprentice, Cassandra, Ivy, Sophitia, Yunsung, Xianghua are the opposite, they have extremely small hitboxes while crouching and guarding, such that if you're too close, 3B whiffs. If you take a half a step back, your 3B WILL connect with them if they're crouch guarding.
This could be fixed by reducing the minimum range of Apprentice's 3B.