I would love controller support for this game. And I think it would work very well given the turn based nature of the game and the isometric view. Just look at how Xcom Enemy Unknown mastered the controller. The only mildly tricky bit would be the inventory screen, but even that would be a pretty easy bit of coding when you get down to brass tax.

But please fix the crashes and the performance issues before you endeavor to do this (if the two would in any way conflict with each other). And the naysayers can go stick their heads in sand. They don't have to use the controller if they don't want to.