One issue is that Phantom Spire is just spooky tower. Generic theme and generic name
Another issue is that the spire part is metareferential in a way that "
insists upon itself" as peter griffin would say. as I'm thinking about it, it seems pretty rare to hear the structure itself referenced in a coaster name. I guess mystic/shivering timbers count, the towers of terror, vertical velocity as a tagline maybe. but a coaster name usually is something. some kind of journey, maybe a flight, or an animal, or a spooky creature. a spire is just an inanimate thing, and not one that has a ton of identifiable qualities to link with a theme. like yeah it's spooky tower but it's also bad ramp
