I do not think this will work out because of engine/script limits, maybe try a differenet approach to fix melee.
Give him decent AC and crit roll for weps like waki. They have no advantage fighting full tanks. They lack speed toughness and stable alpha damage.
Imo new mechanics should be introduced to enhance melee, basically, if someone with a non-close ranged weapon, (other than a shotgun, handgun, uzi?) finds himself adjacent to a melee guy, he should have a major disadvantage (and not advantage like in case of a 1 hex minigun burster). Would be more realistic also would promote melee usage more. Could make people use secondary weapon and switch when needed to a combat shotgun or something with a knockback. I already suggested a "free disarm" perk for melee'ers (or weapon perk on most melee/unarmed weapons) if enemy uses ranged weapon at point blank shot, but the mechanic can be anything that serves this purpose. The suggestion in first post is hardly a solution, even if it can be done.
Also, the reloaded team is quite adept as I've seen, changing roll/crit/stat/etc values should not be the only way to think for solutions, but implementing new features, enriching the game mechanics.