Being or To be

Other locations see it as a separate entity from the cheerleaders, although they share a common purpose.
This may lead to the squad [being / to be] more of a dance team, performing more complicated routines that are usually associated with cheerleading.

I think both can be an anwer but my book says the answer is being. I don't know why to be is wrong.

Pls help me out.

Terry Kim
English Teacher
Korea