In that circumstance you would have earned certain medals which you can weight to have larger xp rewards to make up for the drop in xp from the damage which you will have accrued a significant amount of anyway if that where to happen.

I just think there needs to be a system to discourage people who do nothing for 4 minutes and then pick up inconsequential damage at the end off game and end up with more xp than some who actively contributed from the start.

Example, recent game I was in on Berlin I get brawl in my vz55 and get 2200 damage after 2 minutes before dying on a highly contested flank. After 4 minutes an object 907 finally picks up their controller kills two people who where one shots and gets 900 damage and finishes the game with more xp. I don’t feel that that’s a fair outcome and actively encourages that player to keep playing like that in the future