not sure what you mean...by shallower, are you being facetious?
PSP has had a displaced threshold for as long as I can remember, well, okay, at least 10 years.
On the public procedure, I noted an issue with the design, the controlling obstacle was actually an eval point left in the database from the new tower location studies...which was why my 3rd party procedure had much lower minima...(and they had issue with my design!, and new tower at PSP?? so one knows how long the point sat in the database...)
I might add, that I raised enough hell regarding all of the obstacle points, temp or not, that were in the database that everyone had to design around, that the FAA initiated a major clearing operation.. self serving of course, blaming the past holder of the info vs the current...