Now, the solo-only queue option is exclusive. A game mechanic prohibits people from playing with their friends (except by dumb luck of landing on the same team.)
A THIRD queue for solo-players can only BENEFIT the POOL of PVP players.
Currently you have new 50'es who join a WZ, get smashed by a premade, never to return to PVP again due to a REALLY BAD experience that was NO FUN.
By a solo-only queue you get ppl who still enjoy PVP, and ALSO can join the premade queue as they decide to run their own premades later on.
CURRENT SYSTEM DISCOURAGES NEW PLAYERS FROM JOINING!
(I REALLY wish the devs would come with a statement on the issue)