I honestly believe its time for wow to implement a solo Q Arena feature. One of the worst parts of WoW PvP, is finding people to pvp with. Or participating at all. It can be a real headache.
The overall success of solo Q features in other esports and competitive games shows how promising such a mode is. You could honestly say its as much a part of something like League's success, and even CS:Go's success, as the game itself. Its an easy way for people to participate in competitive pvp, without needing to go through all the troubles of finding a team.
And, it would help solve the problem of finding people. You could solo Q, and when you find people at your rating, you like playing with, you could easily just make a team and go into normal 3v3 arenas.
You could just pick your role, and que up. Work just like any other modes; you play 10 or so to place you in your elo, and then you que with people of similar skill levels.
Now, it wouldn't be a complete replacement for normal arenas, but it would solve the pvp woes of a ton of people who have no one to play with, and dont have the achieves or ability to find likeminded people. I would honestly Q ALL day. It would have kept me active in WoD, too. I quit solely because none of my previous partners came back, and I was on a dead server, and had very little options besides a ton of trial and error and hunting to find anyone to play with.