I voted for the build to be "polished completely."

My reasoning behind this is that the fans need the mod to release a series of very stable mod versions with most if not all new features implemented. This way, the fans can spend weeks enjoying that version, which gives the mod developers time to work on the next version while getting constructive criticism from the fan beta testers. If an unpolished build is released missing some "key" features, some fans may feel that the omissions are game-breaking and either stop playing the mod completely or spam the forums with criticism about the features being omitted. This would just cause many headaches among the design team. Therefore, you should make the fans wait a few more weeks for the "polishing" to be accomplished.