Problem is you can't really look at Ranged attacks the same way you look at melee or magic based attacks. Ranged attacks are more of a hybrid of the two. Mainly because we are constantly attacking like melee but from a distance like blm and we are not just relying on a high dmg spell every few seconds to balance our dmg/enmity.

The thing is we are designed to do damage from a distance however, because of the fact I mentioned above we end up pulling hate even while holding back because of how enmity works in this game.

As Noodles355 said:
Adding means like camouflage that purely slow the rate of enmity gain will never be a real fix to ranger's enmity problem for the simple reason that hate caps. If you had full time camouflage, all it means is hate would cap slower and that doesn't really fix the problem.

The job doesn't need more tools to slow enmity gain down. We need a true fix that deals with enmity once it is capped so we can continue to do our job and not burden every other class in the PT.