I love this idea as well. I think mobile aspects to MMO's really increase the immersion in the game. I've even thought of cool it would be to extend mobile access in some form to mini games or the trade network. Like a stock ticker or something. Or playing games that people can join while in cantinas or something. Mobile aspects to existing games is only gonna get bigger as time goes on. Now as far as managing crew, I don't think it will negatively affect the game. The problem is that as soon as you talk about people having an 'advantage' you head down a path of encouraging entitlement or fabricating issues that aren't really there. If you wouldn't tell somebody that it's only 'fair' they are limited to 2hrs per day, then you shouldn't tell them they cat play from their phone. If they are not exploiting any system, I don't see the issue.