I know they have various people writing for them and I do know that Azusa gets A LOT of lines. But, watching their concerts you don't get the feeling of lead singers or whatsoever. My guess is that it goes this way because they're indies and they can afford to mix around and all.
Which is why I want them to get a major label so there will be some... I don't know. Organizing in their songs.
And they need new/better dances. Seriously. They started out well, but lately it's... really not that great nor impressive.