Steiner still has several weapons that I need to find/make/buy, but I have all of the active skills for Zidane, Quina, and Will, along with most of their passive skills.

I'll need to beat at least one bonus boss to get Dagger's final summon, though I don't intend to fight Ozma, and I don't plan to catch 99 frogs in the frog-catching game. (I think there's another bonus boss tied to that)

Eiko, not Will. Strange auto-correct there.

I've definitely reached a point of no return. (Or at least the dialogue makes it seem that way)

Kuja's going all "If I go down, I'm taking you with me!" to an entire world.

I've made it to just before the bonus boss fight. Everyone has all of their abilities unlocked aside from Dagger (who needs to beat this boss to get her last summon) and Vivi (whose last spell can't be unlocked until later on in the final dungeon).

Much like my experience with trying to complete the bestiary in Dragon Quest XI, unlocking the abilities felt natural. I had to do a bit of grinding, but it was great to see tangible progress as enemies that were practically minibosses before fell surprisingly quickly to my party.