I would love 2v2 custom matches. I really don't understand why custom matches force 4v4 in the first place (then even more people if you want spectators, making it a ridiculously involved effort just to train a new player you will never be able to play alongside anyway with no ranked group content).

I don't have enough PVP-liking friends to use them for any of the silly fooling around I really want to do (and cross-world won't solve this at all). Obviously healers would be unbalanced but let the players decide which roles to take - or just force them to not include healers, I'm a healer main and I would still want the feature anyway. Heck, let us do 1x3 custom matches to help teach DPS players to take healers down more effectively if that's what people want to do. I want to be free to play with all of the toys we have available.

I would also love 4v4 unranked. Ranked isn't fun for me and 8v8 barely teaches you anything as it's relatively low pressure. Let LPs join it too. There's so little small group content in this game that isn't facerollable already and currently, PVP has none.