Add the ability to play other guild member's teams

I've been thinking the same thing for a while, I'd like to see this become part of the game. There has been so many new releases and updates recently that this would be a nice addition which wouldn't require sinking loads of time and resource into.

I too would second this.
The ability to freely play against guild mates, learn different strats against key classes, or groups of classes would be very useful, and another reason to have a guild, and take part in one.