Seeing "lol I wants to include characters from all my favorite games" in an RPG is usually a huge red flag for me. Often it is indicative of a very poorly thought out game.

"Sonic amd mairo team up to fight sefiroth and ganondorf in kirby's dreamland lol!!1". Ugh.

However, this looks promising and well thought out. I like the idea of having equipable spells (over learning them) and having a single class.

I also prefer the AI-controlled allies over Gambit system, mostly because I've never played FFXII and have no idea what it is.

And, lastly, only items from a particular region sounds better than generic roguelike items.