I understand why many want to see the M60 nerfed but I would leave all weapons as is, but I would increase the lateral movement when using pistols, assault & light weapons. Increase it another notch if using the light weight gear.
Toe to toe an assault guy should be able to outmaneuver & take out a medic using an m60 out but it's not the case right now.
I would even make magnum ammo default for assault class only but that might be going to far.
PS. IMO increased lateral movement would permit people to get away from the m60 srpay without nerfing, even at range.