I don’t think they should release it.
This isn’t the 90’s, everyone has a broadband connection now. Any tweaks or additions should be in the form of DLC. My opinion is they shouldn’t add any new characters, and if they do, only add T.Hawk and DeeJay because the game kinda feels empty without them, or at least it did when it came out. All they need to do to the game is add multiplayer lobbys and work on the netcode, and maybe give each character his/her own stage/music. I don’t even think it needs any balancing, while there are overpowered and underpowered characters this is probably the most balanced SF yet. I don’t think there’s anything wrong with the game, so it doesn’t really need an update.