the DMR is superior, which is very fustrating, especially on big team. i was looking foward to the greater variety in weapons the loadout system would bring to halo 4, but instead everyone uses the DMR or is punished for not. i find this is only the case on btb though, the BR and AR are much more effective on regicide and 4v4 games.
it would be nice for the weapons to be balanced better, not just the DMR vs the BR, but the other weapons too, like the SR, CC, and supresser. in short, look at your statistics 343, nerf the DMR and buff the less used weapons.