I notice last beta there's still large swathes of the game that are blocked off. There certainly already exists something for WvWvW... I can't imagine ladder PvP needing anything so different that it can't be included or isn't already included.
I was referring to sPvP though, which has you grouping up with different team members, especially if you PUG it. The issue is evaluating properly the team's level and matching it accordingly with another team.
RA had a lot of fights where one team overpowered the other. I would like more fights that are balanced, because those are most exciting.