Hmmm the idea is somewhat promising, however they're some notable problems, first a subterranean species would not have eyes, of they would be blind, in permanent darkness there is no need for their use. So I don't see how they've evolved, if you can shed some light on this that would good.
Secondly are the abilities natural or born from technology?
Thirdly you say that there is a major city underneath every major city on earth, at this current moment in time I'd say they're at least 700 cities on earth, and having another city underneath each one would must likely destabilise the earths crust and it'd probably never work.
And they many more flaws with this, I think it will work but unless you solve some issues that make this world of yours impossible to exist then people might start to appreciate it.
Sorry for the grief, but I'm trying to help.