Ok, unfortunately there does seem to be a more common gameplay issue related to the "high window" issue from my previous post.
Right now, melee enemies have no way of dealing with players on top of furniture or in spots they can't path to in general. Basically if you are sitting on top of a table or something the minions just get stuck near you with no way to respond, and you can just pick them off from safety. It looks really broken to be clearly visible in the same room as an enemy and for them to be pretty much unable to respond because you're standing on top of something.
Obviously elite vampires don't have this problem as bad as they can throw fireballs, but enemies like Minions (and possibly both of the "specials" though haven't had a chance to try it with them yet) are susceptible to this.
I guess as a possible solution, The Dark Mod (http://www.thedarkmod.com/) used to have this exact same problem with sword-wielding guards in that they'd be left with no reasonable options if they were trying to attack a player in a spot they couldn't path to. The solution that was implemented there was to give all melee NPCs a last resort low-damage range attack that they'd only use if they saw a player in a position they couldn't path to, which in that case was throwing small rocks. The rocks do very little damage and aren't anywhere near as good as "proper" ranged attack, but they reduce the awkwardness of the situation a lot and mean the player can't just sit there and eat rocks as long as they wanted.