I really love the dreadsteed mount for underdark characters. The evil skeletal look is a lot of fun and it's a great piece of graphic art. However, I noticed two aspects of the model that could use a touch up.
1) The mount's reins float around in an awkward fashion and tend to be elevated above the rider's hands, defying gravity. It looks even more awkward when unmounted or when the mount turns its head. Perhaps they could be lowered and strapped to the saddle, or just removed or something?
2) The eyes behave strangely when mounted. The red eye glow suddenly goes above the eyes and which looks like glowing war paint or a graphical glitch. Because there is only one model and there are no customization options, I think a plain black or generally dark color for the eyes would serve better and fit with a variety of costumes.