To me the different beatmap time problem isn't that much of a deal in exchange for such a nice feature. Also what could be an option is to disable this "free play" if there is a huge gap beetween beatmap lenghts or atleast tell the game host with a message at the right bottom of the screen.
Despite this issue this a feature I would sure love to see in the near future.
Edit: Another option could be to let the player with the shorter beatmap join in to the longer one. Of course this would mean that the map is too challenging for him but better tha letting him get bored. Letting the player spectate the still playing one is another way it could be done.
Despite this issue this a feature I would sure love to see in the near future.
Edit: Another option could be to let the player with the shorter beatmap join in to the longer one. Of course this would mean that the map is too challenging for him but better tha letting him get bored. Letting the player spectate the still playing one is another way it could be done.