Conceptually, I don't really like the sounds of the changes made to O2
The issue with modern life service Games. They
will change and either adapt and follow or go home.
I know times when different leagues played different mods for games (e.g. ProMod for CoD4 in the ESL while Clanbase used a different one, IIRC) because of different opinions in how it should be balanced and be played. You would find servers running different settings, mods, etc. To be fair, they had a server browser with custom settings in OW1. I don't know if you could earn XP on these though.
But that way you fragment your playerbase too much which could hurt in-game monetisations, the only thing they really care about.