While I'm here, I'll throw in a suggestion for the Undead Racial Talent:
Resilient Body Gain 5 Physical armor per level.
It's not a large amount, but it adds up. At level 30 that's an extra 150 armor. Numbers can be adjusted as needed, but that seems like an okay starting point for theorycrafting.
Lore-wise it makes sense since Undead don't have all them functioning vital organs which living folks need. Maybe even toss in "Immune to Bleeding" and possibly "Immune to Poison" as well.
I like your idea for the undead racial, that actually sounds really good!