TL;DR
The mod filter when browsing public multiplayer games should have more options.What ?
At a minimum there should be an options to only show games with the same mods as currently active.Options to filter for games with only mods already downloaded and games with at least all active mods would be better.
The best would be a whitelist and blacklist for mods.
Why ?
Say the user wants to play a Space Exploration game. Finding one in the long list of public multiplayer games is tedious. Each came has to be selected and the modlist read to see is Space Exploration is included.Or a player doesn't want to play a game with waterfill because he always drowns himself. There is no way to hide those from the list.