Global Moderators

I've already mentioned two examples where not being able to tell who a player is causes harm. Many players won't be aware of the foe feature (while it also doesnt work for matchmaker), and you didn't give a solution for the aeolus chat issue. I'd also note you haven't given a reason for the rule not to exist beyond 'two people might want to have indistinguishable names'. If two people want similar names that's already probably ok, so you're presumably not talking about similar names, you're talking about indistinguishable names.

In other words, if someone wants to call themself maudlin28 then that's similar to my name but clearly distinguishable, so is probably ok (although this shouldn't be taken as a general rule as I'd have thought the main factors likely to be taken into account on whether a name is ok is both whether the name is distinguishable from others and if there's an intent/risk of impersonation). If instead they want to call themselves maudIin27 then that's indisguishable from my name even if technically different.

There is a benefit for both other players and mods for being able to tell different players apart.
For example, if a player starts breaching faf rules in aeolus chat, and there are two people with identical looking names (one using lowercase L and the other uppercase I) the wrong person might be accused or punished.

Similarly you might play against someone and really dislike the experience and then end up avoiding a different person (with the same looking name).

I also don’t see the benefit from eg allowing eg both a maudlin27 and a maudIin27 to exist; the main ‘benefits’ would be someone with malicious intent (via impersonation) or someone thinking it would be funny.