This site (among many others) has been very critical about FINAL FANTASY XIII. So as a fan, list the things they should keep and the things that shouldn't grace the sequel! So basically if you were to talk directly to the dev team, what would you tell them?:

What I want to see:
-Keep the Combat System (one of the most intuitive of the series)
-Introduce new characters/ bring back some other characters (ie. like serah)
-Have it end in a way to open up the Fabula Nova Crystallis universe so we actually have a story-relation when playing the Type-series and VERSUS XIII (other than the "vague crystal theme")


What should Change:
-Linearity; seems like FF fans like the illusion of non-linear cities, so give it to them
-Closed maps; Liked what they were doing with the open areas in Pulse. Now they need to do that with Cocoon (ie. open up different districts/ different areas) like how Midgar was in VII.
-Bosses; Make better bosses. More variety and more difficult
-NPCs; SERIOUSLY SQUARE!!!! And not just small banter as we pass them. We should get Full on conversations VOICED!
-Side Quests; Get rid of the floating Cieth stones, introduce NPCs that hand out quests or a hub to get quests!
-Difficulty; ramp up the difficulty earlier in the game. It seems alot people just button-mashed X until they got bored and stopped playing after the first few chapters. It was that easy! I realize they wanted to get people used to the system, but that's a major turn off for the RPG crowd.

Have a lot more, but can't think of @ the moment. Add your thoughts!