I don't expect this to be a game that has regular updates or anything like that, so I don't think it would be the victim of barrages of angry players demanding updates or anything like other games are. I think it'd be more like a complete game that happens to have an online component, so players can see one another in the game.
I think this simplicity would actually be quite cool, and if there were special "seasonal events" or anything, then that would plenty enough updates for me. It makes the game less demanding on time and thus more fun to play (for me anyway

).