Oh yeah, its a bit of fuuuuu when you first start because things are so different. x_x But its not too hard by the time you're done with the 012 storyline, and with the way they've redone it the 013 storyline doesn't feel as tedious as it used to be. But that might just be me.

Myself though, I currently have Cloud, Squall, Tidus, Zidanne and Onion Knight all mastered at level 100. Cecil and Warrior of Light is next for me, I think. >.o You are right on Onion Knight being great to use though, and his Alt 2 outfit is cool. '^'