I'm up for playing someone who doesn't have or even want a keyblade. I'm thinking of playing a gunslinger of some description who takes the fight to the Heartless to avenge their dying/dead world. Think this would fit in the theme of the game?

Edit: on the subject of Keyblades becoming meaningless, just keep in mind that there is a canon location called the Keyblade Graveyard that literally contains thousands of Keyblades from deceased Keyblade wielders. There was a point in the history of Kingdom Hearts where there were literally thousands of these people and there was even an academy to teach their use. Yen Sid (the sorcerer from Fantasia) taught at this school, so it's not a stretch to assume that Sora and pals reopened it after defeating Xahanort.