Not used it in my games as of yet, but FWIW reading over the Gazetteer entry now it seems like a great place to stage a climactic campaign endpoint.
I mean, the only of the Great Obelisks that rises from land makes it the place to explore for anyone seeking knowledge about the nature of the obelisks. Combine that with it being an entry point for all these monsters and aliens a vicious fight or powerful magical working seems almost natural. It has links with Azathoth as well, so i would think of Sharath as the place where the world ends (in both senses of that phrase).
Níu man ek heima, níu íviðjur,
mjötvið mæran fyr mold neðan. (Völuspá)
(Nine worlds I knew,the nine in the tree with mighty roots beneath the mold)
Realmsofmelpomene