Why would you want to play as Watchmen in PVP? Every saber form speaks for themselves what those are best at, we do not need three skill trees that are equivalent in PVE/PVP and single target/AOE. It is more interresting that you switch forms during operations to pick that suits the bossfight and/or group composition best. What I would appreciate though if I could save my skill tree and skill bar settings so that I can switch quickly. The current solution is simply wasting the players' time for no reason.
Watchman spec used to be outstanding at PVP. Bioware nerfing watchman spec was a mistake that they made.