Well I'm not sure how he'd react at this point myself.
...but keep in mind, while he is technically undead, he wasn't completely drained of blood to become a ghoul, and his blood stills flows in a way that would keep him rotting THAT much. Maybe tone down the missing flesh and rot a bit, but not completely remove it.
So I assume he doesn't have a bunch maggots crawling around or anything, and he has regenerative properties, or at least when he's being fed regularly (he was starved at the point where the werewolf in his history ripped his face apart). He already tastes and smells, but he seems to ignore his senses that don't involve the hunt for a worthy meal, and he has a bunch of rot on his teeth and fangs (oh boy...). Just being in the holy aura this city was giving off, his skin began to sting and itch uncontrollably, so if the Aether was applied directly...
Ouch.
This will be a fun post! I'm excited. Want me to post next due to direct interaction, or are we doing the usual rotation?