I wonder if this could be a possible way to somewhat alleviate the "Premades vs PUGs" issue, while also giving PvP guilds a great option for hosting events. Allow players to create custom lobbies/matches. Invite whoever you want into the lobby. Maybe have the option to randomize groups in addition to specified team assignments. I am in at least 2 PvP guilds that would 100% utilize this. I think it would cut down on the number of premade groups in the queue quite a bit, and also give the organized groups a more engaging/rewarding experience. We could actually have tournaments! Imagine a Capture the Relic tournament! Could seriously be a blast.
Also, please allow players to toggle on "player aggression" inside their houses. If players are in a group then they are automatically tagged as "friendly", so you could orchestrate team vs team scenarios. I want to build a PvP deathmaze in my Psijic Villa! Think of the RP potential, ZOS!