[ThroneofDravaris]

Espers are pretty much useless. They don't do a great deal of damage and are a pain to keep alive in any situation where you might want one around.

There are so many problems with quickenings I can't believe I haven't mentioned it so far. Apart from being an incredibly moronic idea (being a through back to the days where you had to sit though obscenely long attack animations) their implementation within the game was awfully unbalanced. From the time you get them (probably somewhere around the Ghis battle) up until around Draklor Laboritory quickenings are game-breakingly powerful. As in, you can win boss fights just by shooting one of two off (very easy to do since you can change parties). After that though bosses will have too much HP for quickenings to cause a significant enough dent to justify an attack that uses all your MP. Sometimes I wonder whether they actually play-tested quickenings before they put them in the game.