It doesn't really matter if you are playing in front of 50,000 if you are playing Stenhousemuir. You aren't going to develop as a player unless you are up against equal or better players every week.
Secondly, if The Rangers hit a sticky patch next campaign you can guarantee that 50k will soon drop to 10k.
I don't think Law is stupid enough to join them (although his haircut suggests otherwise), but if he does, it's his loss. I have never been one to worry about where our ex-players end up. It's all about who is pulling on the claret and amber - the rest are just teams to beat.