@Kevee - I don't know about 11 (having never played it), but a thing that all summons had was...they were freaking badass.

They are THE thing people think about when they think about Final Fantasy (well okay, that and Tifa's boobs =D, but at least summons are up there).

And regardless of control, regardless of how effective they are, they were giant, they were huge, they were flashy, and they were definitely COOL.

And I dunno about you, but, Egis are like, the opposite of cool. They're dinky. And they suck. I don't care what attacks they have, they're midget stuffed animals you would buy at a toy store.