P&Z has lamented the fact that they have no enforcement capability. About the best they can do is shoot for "general conformance to the site plan."
But having gone through the zoning code, the only thing Derby is really in violation of is the entirely-subjective section that says "[a]bove 65 feet, tall building[sic] should not have massing that is boxy, bulky, and elongated."
https://phoenix.municipal.codes/ZO/1215