Disclamer: Not my suggestion, by got it from this post on the COH2 subreddit. I just modified it a bit.
The idea is that you should get extra loot points for performing better, which I think would encourage players to play better. Currently you only get extra bonuses for winning (+500), but a couple more would be good.
A couple examples I think would work pretty good:
If you win:
+200 Loot Points - Domination: win with over 250vp lead
+200 Loot Points - MVP of the game: highest dmg dealt/kill count (team games)
If you lose:
+250 Loot Points - Valiant defense: bring the enemy down to 50< VPs
+300 Loot points - No Waste: Never go above 1000 overall resources (1000 is maybe too small)