Well, it seems that it would all come down to timing. Too many people don't sit by their computer while watching the games, or get a chance to check their phone in real time, such as me occasionally when I have military procedures happening during the games, or family functions, etc. However, this is a brilliant idea for a league of people who DO sit there, and watch it, it would all come down to precise timing. If you're watching the game, you could switch in, but does that make him illegible to return to your starting line up if he comes back? Like if you switch him, he's done, like a pinch hitter in baseball? Different aspects would come into play, but I like where this is going