Use GH for skilled sparring, you can control who can get in and have the ability to kick people if they're being obnoxious. Much better.
Personally, there's no more than 20 or so people I actually want to 1v1 when I'm looking to spar solely against good players. Even if a "skilled sparrer" room is based off leaderboard that already means there's going to be a lot of people who I have literally no interest in sparring and some excluded from that list because they can't be assed to farm streak room to get on leaderboard (myself and most of my friends included.) So I'd almost certainly never use a "skilled sparrer" room.