Any system that gets implemented to reward performance is primed for abuse. The least worst option of them all would be rewards as you play, Exp for kills, captures, assists, and based on placement a multiplier gets added to the experience you gain at the end of the match. (1x, 1.2x, 1.5x) Needless to say Dark Knight meta needs to go before that can happen, and I'd wipe out Battle high or modify it to make BH V more vulnerable to being killed in exchange for more DPS.

The other half of this is the players who cry ignorance. Mandatory PvP tutorials need to be implemented before ANYONE is allowed into PvP. The bare basics at a minimum such as recuperate, guard, purify ect. That way, ignorance will be no excuse, and if people chose to sit around the entire match doing nothing, they'll recieve nothing.