Why haven't random and group 2v2 queues been implemented? It seems like such an obvious solution to a lot of the problems with ranked. It would reduce the "teammate lottery" effect and be more skill based. Matches would generally be shorter and with less people needed there'd be more queue pops. Win trading would likely be harder. In fact I think 2v2 should replace 4v4's, to avoid splitting the queue in two. 4v4 can remain for premades.
I would also love to see a 1v1 queue. Dueling in SWTOR is some of the most fun I've had in this game. Sure, it would make class imbalance more apparent, but the leader boards are organized by class anyway and most people in this game run many alts. The only issue with this I see is two stealth facing off. A simple fix would be to limit time in stealth to 30 seconds, and after that force them out of stealth and in combat.
I didn't want to make this yet another complain-y thread so I'll just say this. With OWPVP long dead, ranked PVP broken, and the new wz lockout. This is probably the lowest point in the games history for PvPers. This is something that should be trivial to implement and would give some veterans a reason to stick around. Maybe some of the current regulars in ranked wouldn't like it, but if what they liked was popular there would be more than 10 of them.