I gotta fully agree with him ...
You have that peasant doing nothing except dying in the winning team and gets x5 while on the other side, you have a few good players trying to make their team win and they are stuck with a x1 with no bonus per kill. Multiplier should go up with your killing spree + winning a round (basic multiplier + killing spree). That way if you keep losing but have a descend kill ratio , for a minute or so in the round you might have went up to x3 or x4 which is better than staying at 1. So the guy in your team doing nothing but hiding in a stupid hut or in spawn won't level as fast as you do because you're doing a good job , which makes things fair imo.
Why not leveling a character to 31 while staying naked the whole time ? You don't have to fight, you get a very bad K:D ratio so you're switched to the winning team and get more often a x3+ multiplier, you don't have any upkeep so you farm gold like crazy, and you actually can reach lvl 31 before someone who's playing a lot, tries his best to be useful and have a descent K:D ratio.
Bring back the old system where campers weren't getting anything for camping and people killing were getting what they deserved ...