I didn't care for the old collision system. It didn't really feel like I was actually "colliding" with anything so much as there were times when my character just stopped moving. It was especially annoying when it happened over and over. A system where you couldn't move through character models at all would be even worse. If a bunch of people walk up to the guildleve counter behind you then you'd be stuck. I don't think that jumping on people's heads to get out would be any more realistic, either (though it would be funny ).