I like most of this however, I hope this means you are still looking at this cause there still isn't any mention or look at this with Kheldians.
The Dwarf form is supposed to be a stand in for a tanker role, and these changes are going to make it unhealable when under debuff, preventing the Dwarf from doing the tanker role.
With this change, the Kheldian Dwarf which basically fills the stated Armored AT role will be unable to be healed and incapable of keeping itself alive while under debuff, counter to the stated design note. This really needs to be looked at.