It would be nice if when creating a lobby, alongside the already available league configs/whitelists, there were also TF2Center ones.
Would suggest having 2 of them:
TF2Center Fun - Everything that can be allowed is allowed, for people wanting fun lobbies where they want to play demoknight or whatever.
TF2Center Serious - Only weapons adhering to very strict meta allowed, for people wanting a more serious competitive experience.