Poor pathfinding abounds in this game, by the way. I've had a companion go completely around a building in the total opposite direction I was traveling because they forgot to lay pathfinding tracks for a simple slope upwards. Of course they get killed from encountering hostiles on the other side by themselves...
I think it was more of the fact that due to the poor navmeshing followers could fall off and die, this rarely happened in fallout 3 but there were really only hills. The 10ft cliff range might be a bit of a problem.
I hate it when PC users have egos and make quite a bit of assumptions.
Correct me if I'm wrong, but... Isn't the G.E.C.K. for PC users only?
But aye, I wouldn't mind them doing away with invisible walls and releasing a patch to remove half of them or some of them. I hate not being able to jump on top of something that looks easily jumpable, yet when I land on it, it pushes me off. (Sometimes to my death.) But I can live with it and deal with it. It's not game-breaking. Just a little less fun and explorable, not much.
Just for the sake of arguing, I'm running the PS3 version with the walls modded away.