Play against our own roster

You have no idea how much I would love this to be a feature

Great idea! I would destroy my A team with my D team for fun :)

Actually that's a good idea
I'd love to test my A team on defense

Sounds cool, but if I put a my droids against my exact same droids, RNG decides who goes first (and most likely who wins.)
I'd prefer a for funsies real time (or both optional real time and AI) match against fellow guild members that has no reward and no cool down. It'd be totally sweet, this way you're not limited to the same 5 arena matches and GW (that nobody likes) every day

So you posted on the forums to request a feature that would enable you to play with yourself? Doesn't seem like a great feature.