For 25-player lobbies and some persistent state, I can't help but feel it's over-engineered. Certainly many games (including popular mmos) have been made with much less. This seems like they were engineering defensively against the potential of massive success, which ends up slowing everything down at the point where you need to move most quickly (pre-launch game design iteration and testing).

I don't mean to be reductive though, clearly a lot of work has gone into this architecture and they know their problems better than I do. Props to the devs for seeing it through and getting the game launched!