I am of two minds about this. I really love the multiplayer aspect and the fact that you can basically let them do their thing and come back later, but at the same time I would really appreciate to play without the energy limit. Yes, it is a money thing etc., but I was thinking, maybe there could be two versions - one this free/pay to play/real time waiting, and a one-time purchase game, with the option to play offline as well, and with no energy bar. I think it would still make money, because there are two types of players.