I posted about it recently in the feedback thread, but I hope this gets looked at again; the changes has me worried it nerfs Kheldian Dwarfs since the heal being debuffed would make them weaker as a tank stand-in.
Kheldians need some kind of AT Heal Resistance cap at the very least, like between tank and scrapper levels.
Also, since the dull pains that ignore it are max HP increases, why isn't Stone Armor's Earth's Embrace still ignore heal resistances since it also increases max HP? Would make sense to me.