Awesome To Balance Load-Outs

Instead having players choose different kinds of weapons in load outs, such as the DMR, BR, and AR, why dont they all have the same type of weapon but in covenant or forerunner form? Such as in a normal slayer game, you will have the choice of a AR or Plasma Rifle/ Repeater. And in BR slayer, the BR or Carbine, and in some other slayer, DMR and Needle Rifle. I think this would balance the game and mix it up a little at the same time. What do you guys think?