Bases - Shouldnt go
You already have a good working model with transformers. Bases provide resources, and a purpose for champs that are just collecting dust. Just remove the alliance portion and make it pvp. We need other means to gold, t1 alpha, t2 and t3 cc, and tb, t4b, and t1a. Provide missions, and base defense.
Seems pretty easy to mirror it after a working model.