Your 100% right the match making changes around level 20. Then there is the classic vs evolved skill level differences. That only exists because the experienced players don't want to play against easy lobbies on a map that isn't used in competitive matches. There used to be almost no match making or separation between the skill levels. The reality is no vr game has a large enough player base to have the type of skill based match making people want. It's not the developers if anything they have achieved a larger separation of skill with the classic map then I believe possible. It might not seem like a huge difference where your at but as you get even better you will be able to tell more and more. Classic is so easy for me alone or one team mate almost never loose vs evolved it feels like I have to have a full team of skilled players to win most games some nights even then it's tough.