I'll echo the sentiment on Kimarhi. His Sphere Grid makes him wind up being a second tier version of better party members in a game where such a trait isn't really useful. He has quite easily the worst collection of Blue Magic spells in the series and he's easily the crappiest Dragoon character as well. Honestly, he's like the poster child of novelty characters in the series and it's obvious the devs didn't exactly know what to do with him.