No I don't think its a good idea to take characters away for any reason. Look at the way Marvel did Captain America being shot. He was 'away' sure, but he still managed to appear in a ton of comics in addition to the stuff Brubaker was doing with Bucky. Thats the way to go if they do it. Take Spider-Man out in some way, but use it to focus people on what the character is all about.
That said, it seems like doing such a move in the immediate future is a bad idea. Slott's on a roll, the FF stuff is just getting going, and there are several events planned. To me, this would have made more sense at the end of the JMS run.