I disagree, the point where we allow mappers to easily make Player Models atrociously bright colors is the point where we might as well give up and give enemy players a red inline. Besides that, every reworked set of player models has been brighter then their original versions. To me at least the easier solution would be to make a console command to disable enemy player skins as apposed to going through every single player model set and setting up certain materials to be tintable and then adding a parameter int he KV file for tinting them.
Unpopular opinion here, but I prefer it if player models are at least somewhere in the realm of reason, Neon green and hot pink are not colors either side would wear.