I'm not really sure to be honest. Maybe a plot that I care about? Though that's likely not going to happen anytime soon. With that said, I feel this is the area they need to improve on the most if they hope to keep their fanbase.

I would probably jump in with the bandwagon on going for something a bit more "fantasy" or at least medieval; and finally move away from the more modern world and star wars type stuff we've gotten for the last decade and a half. Also no time travel. Something about the words Final Fantasy and Time Travel never mesh well for me and all of their time travel plotlines are garbage, so let's just stick to one setting please.

After playing XII:TZA recently, I would love to see Ito take another crack at the ATB system for the game, since he mentioned once upon time ago that he had some more ideas for it. It doesn't necessarily have to be XII's system but I would love a system where more thought needs to be put into customization and strategy.

I would like some actual level design for once. I'm kind of bored of Squenix's love affair of roads and sandboxes.

Yasunori Mitsuda for music, cause he's a fantastic composer who doesn't get as much attention as he deserves.

If none of this works for the company, then I would suggest just putting the setting ~IN SPACE!, cause nothing says an IP has jumped the shark like placing the entire idea in space. Then they can stick to remakes and mobile titles.