Also don’t forget that about half the craftable items in the game give some sort of extra damage against undead units. . .
Basically, stalkers cost blood diamonds, which Lich doesn’t have much use for. So sometimes you’ll build up some stalkers and put them on your wall. Other than that, completely useless.
It's not a big problem if it's only Hero Bonus. Unless Jacques wears it, that will feel like lawn mowing your garden.
Also, I saw an advertisement video on their Facebook once showing a new unit, a bigger undead (skeleton looking with huge shoulders) the size of a large unit. Maybe they're planning something for the Lich.