This is precisely what has been happening during 2.0 playtests in Oregon.Like a lot of changes in the packet, there are going to be a LOT of messed up verbal calls for a while; I don't foresee people as a whole being so persnickety that they're going to do more than gently remind you of the correct verbal if you mess it up the first few (dozen) times.
Messed up verbals for a while are one thing, and I'm sure it's going to take me the better part of the year to get the new incants down, but "Protective Reflex" would be a clumsy verbal on its own. If you have to say "Protective Reflex, no effect, visible Prison" every time, that's going to be rough forever, not just for a few months as people sort it out. I don't think there are any other 13 syllable defenses.