I am for a Pre-made, however, only designed for top-tier players.
I believe there should be three brackets for PvP in TBL.
Bracket 1 : Normal matches with no rankings whatsoever.
Bracket 2 : Ranked matches with the exact same system we have now. Modifiy the match-making a bit, if possible. Making it impossible to have more than 2 Clerics on one team for example would be ideal. A mechanic like that alone would drastically improve PvP game play.
Bracket 3 : Ranked Teams. I would not advise to make this daily. Instead, once or twice a week with very flexible timings so that players could prepare for the session.