While I want to see a majority of the album done by Uematsu, I would not mind seeing other faces working on this game. Considering Hitoshi Sakimoto has worked on other games that Yoshida (art) has worked on as well, I'd like to hear some of his work, because he's a fantastic composer.

http://www.youtube.com/watch?v=kuJKEswj82w
http://www.youtube.com/watch?v=QjP6z0YOlSA

Masashi Hamauzu, who is basically Uematsu's protege would be nice as well, he's really good at battle music, and field music, not really fond of anything else of his though.

http://www.youtube.com/watch?v=fH5QcBC0G28
http://www.youtube.com/watch?v=DrMbViOhvV8

And of course, Naoshi Mizuta, who has previously worked on FFXI.

http://www.youtube.com/watch?v=X3c4tV7LWN8
http://www.youtube.com/watch?v=tARfKHBSAfA

There are other composers that I enjoy a lot, don't get me wrong (Shoji Meguro, Yoko Shimomura, Miki Higashino, etc.), But I'm simply going with people who have experience with FF. I'd say Noriko Matsueda, because I thought a lot of the field music for FFX-2 was fantastic, but she tends to be really hit or miss for me. Especially with those X-2 battle themes. :x

While I love the Progressive rock route Uematsu has been going, I'd like to see more variety in the music than just progressive rock/metal. The Toto'rak music, along with the Stronghold battle music is a good example of what else I want from him.