I believe the general point involved is to reduce or eliminate possible means to reasonable identify someone based on hardware or software config is where say a bottleneck might possibly be.
Is a big reason say modded games have such lack of mainstream interests if not mistaken.
One of the best alternative ive ever come across, in idea of course, is to just automate a foe like system to a point and just realize you dont have to manual just add people you have no interest in matching with/playing due to high constant sync/lag issues.
Otherwise to just be able to foe people within match would say be second best alternative to that one, another idea to say help not having to wait.
When a match lobbies and someone is foed they can be highlighted. Helpfully can remember why they are foed of course but again, improvement is the idea, yes?
Thanks