They do seem to have a thing against unsanctioned map apps/enhancements. It was true in Ingress as well. I always assumed it was because they wanted to distance themselves from anything that could be construed as enabling some kind of stalking behavior - or at least construed as "too much" stalker-enabling (Ingress is already pretty stalker-enabling without map enhancements - but the map enhancements definitely make it many times more effective).

If that was at all a reason for their reticence to create capable ingress mapping tools, it must be doubly so for PGO - a game that will attract many more minor age children than Ingress.