Fightstick support would be excellent!
In the coming update (v1.1) 'unsupported' devices can actually be used to play, but they will have random button mappings. A fightstick should be useable… We are working towards in-game user customizable button mappings - to be released in a later update.
As for the joysticks, we’ll have to get back to you on that. We plan to be meeting with our friend, who knows more about that, this week.