The problem is for the Governing Body, is that everything is a red line. And as such, each issue has received so much negative talk and the consequences of people going over these line so well know, that there isn't any slack in the believe system to ease up on. Thus to me, unbanning 'higher education' looks just as bad for the Governing Body, as allowing people joining the police.
This is problem that you get, when you are a very public all-knowing oracle but your prophecies are just not turning out. They should have kept their collective mouths shut a bit more, but these kind of people just go to make a comment on everything.
Thus, if the goal is to bring new blood into the Brotherhood, then tinkering around the edges (like clothing types or hair styles) is not going to do much, seriously. How about allowing Christmas celebrations. As shocking as that might seem, it would put Jehovah's Witnesses back on the global attention map, and for bang-for-buck, its good value ... and I think that you'd be surprised how quickly it would be accepted by the rank-and-file.