Everyone who is scared of undead freaks out when you take off your armor. When you're all covered up everyone thinks you're a normal human. Unless you're in combat with them! How come everyone knows to fight you with healing magic the second you're in combat? It would be nice if they would try to hit you with poison first, you know let me make use of that immunity and healing. Then after that maybe they could realize I'm undead.
It also seems like Taunt only works against players, it's like a mind control on you! When you taunt enemies nothing happens! I see the taunt is on them successfully, but they still go run after the rest of the team.
If you use any ability that grants temporary immunity the enemy will flat out ignore you. If you use something that gives you 100% dodge, well, the enemy will run across the map to hit your friend instead. Might as well just add a tooltip that says "Makes everyone ignore you."