And add them to commander and observer instead.
This would make more sense because the commander/observer need to be able to operate more effectively from a (more safe) distance. Plus extra incentive to play these roles.
Also would it limit the DMR role, which is good, because it's practically just as effective as the marksmen role itself. The FAL and G3 (and even m16's/AUG's) are extremely lethal over distance and the 4x scopes provide more than enough magnification on all maps except crossing. Having unlimited DMR roles on the field just isn't fun and neither promotes to play the objective (to push).