All the guns are extremely balanced IMO anyways. My cousin muches off my live and plays online with me, and he will have to remain level one. I never told him how to do load outs because it will just reset next time he logs out, so he uses AR all the time and usually comes out with about 10 kills a match. Keep in mind the only halo he has ever played was reach and 3 and that was all within a 3 month span of when he moved here.

I honestly don't see a problem with the gun unlocking. Me personally unlocked the BR first and haven't had to unlock a new gun since. I unlocked Light Rifle recently just to see how it plays out, but I still prefer my ol' BR