So everybody has ideas out there about 343i nerfing the DMR or changing the rate of fire. BS angel if you are listening or reading this is my first call out to you to read this and take it to your people!!
Nerfing or changing a gun seems like a lot of work to me. I am no game designer but love to sit down relax and play Halo and yes that includes 4. I have read a lot on here and a lot of people seem to like the BR where as it does not shoot across the boards like you can with the DMR. So no need to Nerf it or change the rate of fire and this goes for the light rifle as well.
My idea for you,
Remove them from load outs, and in each of the boards put a weapons case in like you see in campaign or Spartan Ops on each of the starting spawns so there are say enough for 25% to 50% of the team to get one but thats it. So after they are grabbed from the case they do not spawn back. Make it so if a player wants to they can get one in a OD.
To me this allows people to have a DMR and makes it so 343i does not need to actually change the rate of fire or the nerf anyhting else, allows for less sitting back and pickign people off and forces people to play for the weapons even if it is some amo for a DMR or position on the board.
Just my thoughts.