The lobby lacks flexibility of coin usage and collectibles. Coins should be used to buy projectile trails, trails and other neat stuff.
The person who collects all 50 collectibles in the lobby should attain a "Lobby Explorer" title or something to know how much time he spent in the lobby.
Wouldn't it be neat to be able to bid your unused and growing pile of voting coins, to vote against others who may or may not be participating. For the next played Lobby Song?
Or, create a coin paid jukebox with a selection of songs to choose from?