What if Leatherface couldn't use his chainsaw within 3 metres of a hook?
This would be a perfect way to stop facecamping with this killer. He can't rev his chainsaw when close and if he is already using it, the chainsaw ends when it goes in this range.
In return maybe buff his token recharge speed or make the tantrum shorter. I don't know. But this would completely solve the facecamping problem!