I think that word should become 'hypurbanized'

I don't. Hypurbanised sounds too much like hyperbole to my ears. Retaining that extra syllable seems to make its meaning much clearer. At least, that's the way it looks up here.
Oh, finally finally FINALLY--*I* made a joke and *you* didn't get it! I will add on, and say that you need to say it hypurbanized, not hyperbanized, so people can tell the difference!