The main issue I see with any change to the EXP is:

A: Will make it so players are less likely to que for the roulette for the rewards arent worth it,
B: Will enable griefing even more for the few can hold down the many, all for the lols or IDCs etc,
C: Attitude's will shift and newer players or not as skilled PVPers will be accused of XYZ and getting the team less EXP (PVP doesn't come easy to everyone)
D; All of the above

What we really need to do is reward good play individually and not teamwide, now how that can work out, idk, maybe apply the same math fate participation has and reward a personal bronze,silver,gold based on Kills and Assists?

IDK tbh, best PVP ive had was when Garo Came back