Halo 2 had a very good indicator of who was good and who was bad after the match, and that was hit percentage. I would like to see this stat back in Halo 4.
While your implication is completely wrong (try saying a warthog gunner who went +40 with 25% accuracy is ‘bad’), I nonetheless fully support the statistic returning. One of my favorite things in Halo 2 was to fire a single shot and proceed to hit people the rest of the game for 100% accuracy (which, with the OP melees that have been around since Halo 2, was surprisingly easy to pull off and still go double digit positive).
I was sad to not see it in 3, and then again in Reach. Would really like to see it return.