[Edi]

I don't know for certain, but I think because it was primarily intended for Ermor, specifically Ashen Empire Ermor, to allow them to get some temples up easily, which is pretty hard with so little gold income. It would have become a holy site in Dom3, which would have given it to absolutely everyone.

With the holy/unholy distinction removed, it doesn't really fit very well. Maybe if it was a blood or death site, but not very fitting even then. Also, gold is much more plentiful in Dom3 and you can get temples from events, so given how difficult that site was to find and how rare holy sites are compared to all the others, it does not really have much of an impact.