awesume job! imo if a matchmaking system is implicated, there shouldn't be any ranked tourney servers. just use one method to rank people, it's more clear that way.

for mods, yes a filter sounds just fine.

now another thing is, let's say the player searched again..and was only able to find the same guy he just matched against..imo maybe allow playing against the same opponent once every hour..or so. idk