It may help to combine Titans Tower with Titans West. It's technically impossible for the tower to be central as it's surrounded by the sea... Technically it's located offshore of New York, other versions of the tower have it off the coast of California. So it could be on either side. But seeing as they're almost all fictional cities it doesn't really matter, just once everyone spreads back out you could have t be a few less towers to help make potential groups larger and less separated.
Also, not sure what this would mean. But some characters will be cut off anyway because they live in Seattle, once locations are determined, maybe a tower could go near there and we could just combine those sections. It WOULD be weird to have towers around the country without any towns for the titans in residence to protect...
Just some suggestions