This is on the megathread about the height and backstab advantages. It makes all encounters trivial because it reduces all classes to the same "get high and shoot down" mechanic. This one mechanic basically undermines the entire 5e ruleset by giving class specific "advantages" to all classes with none of the drawback at lv 1. What is the point of making an assassin when every class can get a backstab advantage or a ranged ranger when "high up" means big damage and hit chance for everyone?
Simple solution is to remove the height advantages which shouldn't be there anyway and give NPC's better AI so they move out of range or out of sight.
