Launcher UI had a confusing element--it showed "Updating" and "Initializing" on the launcher dialog along what was apparently a progress bar, but nothing moved. I was allowed to hit "Play" while ignoring it, but the bar shouldn't appear it's not going to do anything, or it should appear filled if the Initializing action is complete.

Also echoing previously posters' comments--this is starting to look a bit like an uncomfortable add-on if it's going to be bundled with all game executables. It would be best if you could include a "hook" from the game to the Matchmaking lobby program, rather than calling it a Launcher, and leave the multiplayer launcher and the games as separate stand-alone executables. That way, you can update them separately, and users can play the game single-player without having to update the game executable every time you update the multiplayer lobby program. Otherwise, this could end up begin just as inconvenient as Steam DRM.