Uh... know you not how XIV's PvP works? PvP in XIV takes place in instances, away from everything except itself. Frontlines is only in the Roulette to shorten queue times, not that it's helped much. Wolves' Den is still very much not. Leves are like little quests that only work in the fields. If you leave the area the leve takes place in, you fail. They even warn you about it when you start one.

I get that you like PvP, but you are part of a vocal minority. This should be immediately obvious given how long you STILL have to wait for queues even after Frontlines was added to the Roulette.