I realize you guys do this stuff in your spare time so I don't expect these to be terribly high priority, but I've been thinking about some potential UI suggestions for the lobby. First, on hosted games, the title of a game could get a character limit to help with displaying longer names, or the tooltip showing the players in the game lobby might be updated to show the full title of the game if it exceeded the displayable characters in the game selection.
Second, being able to sort the online player list by name or by rating could be nice. Third, having the option to show the online player list in each screen of the lobby might be nice. I find myself flipping back to the player list to find someone's rating before joining a game so I know the game would be more evenly matched. Lastly, the tooltips for the live replays needs some love, basically parsing things better, maybe.
Again, I don't expect this stuff to get done right away, it's just food for thought. If I think of anything else, I'll edit this post. Thanks for the great work on the lobby so far.
Edit: That was quick, I like the new lobby creation dialog