First of all, this is by far the best mod i played for M&B. Thank you for making it!
The only thing I think could make it better for us who play undead would be to have the option to recruit basic skeletons (like the ones you raise, quantity is more fun than quality) instead of mummies. Mummies are pretty rare, and the skeletons look awesome.
And also give the players an option to raise skeletons instead of a random choice between skeletons, shades and zombies.
This would be really great for us who play undead!
I'd be happy to help you out by editing the undead towns to a more evil look (they look pretty normal now) if you want me to. I would need some evil props though.