Sorry, the Frankie's Castle info is out in the wild now, tweeted and shared among the normies.
I think it'd be great for the whole land to be Frankenstein Village. When I think of Universal Classic Monsters I do think of him first. I remember getting my photo taken with Frankie at Universal Studios Florida in 1990 even!
Plus, as others have said, with the popularity of things like Hotel Transylvania from Sony Animation, I can see them wanting to differentiate themselves, while also leaning into the one property they really shaped the face of the most out of all the monsters (literally).