Well caves shouldnt be able to be blocked by anyone now with the GM's being able to set automatic zone resets. The fact that there are now harsh SL rules should help to encourage people to remove their LE's but I can't really see this having all that much impact on LE'd people. LE's keep the LE in because they don't want to be bothered by un'LE's.
I do like the direction things are going though, I just hope it doesn't hurt the population too much.