Why not just make it Uncharted 3? That's what it sounds like.
Here's a thought... Stop rushing and start crafting. My team steamrolls noobs and we see plenty of "high levels" we generally maintain our clans. Most of us stay in the 85-110 range on average. It's not that hard. Just don't rush. Play the game as it was intended. Craft, mark, revive.
That's the thing. You shouldn't have to jump through hoops in order to get a decent score. As long as you play well in your chosen play type there's no reason you should be penalized. If somebody can get enough kills in a game without running around crafting every item they possibly can or healing people who don't actually need it then he should still be able to make his quota. As it is, eliminating the enemy team, which is the actual objective of the game, gives few enough parts that you can just completely ignore it and still get more parts in a match than somebody who gets 10 downs 10 kills.