Request: Upgrade Movarth's Lair

So Movarth is supposed to be an ancient vampire who is both powerful and legendary. He's one of the main characters in Immortal Blood. You learn he's planning a subtle takeover of Morthal, has a whole nest of followers, and clearly thinks a lot of himself. But he's living in a total craphole cave just like pretty much every other nameless vampire in the base game. This has never made sense to me.

Maybe he's not Harkon (whose crib is also disgusting, tbh), but a guy who's trying to take over a hold and has a lot of power and influence should not be living in a filthy hole in the ground. He deserves better. We deserve better. If the vampires in south Falkreath can have repurposed Imperial forts, why can't this guy have a hidden lair with an actual high quality of life?

My request is for someone to give Movarth the attention he should've gotten from the developers - a decent lair for a former hunter turned into that which he most hated, and a better fight. Dude should be living in a snazzy lair like some of the hidden vampire home mods that players can have access to, but he's not. Make it make sense.