For the first time I'm making a character based around Luck (10) and critical hits. Something curious I never noticed before is that aside from Luck's crit chance, skill point boost and gambling win chance the game states it causes "enemy mishaps". I can't seem to find anything on this on the Wiki, what exactly does that mean?

Doesn't affect anything I've ever seen. Maybe if you take Miss Fortune it'll do something, but otherwise I've never noticed (I've also never played with less than 9 luck, however)