winterhilf, correct me if I'm wrong, but the strategic areas of PHL 16 have reversed neighboring, judging by what I see in the StrategicAreas.ai. That is, AI can only attack the mains from normandie_cafe while it should attack other way round - normandie_cafe from the mains.
As for 16 layers in general, personally, I almost ignore them to the degree that some of the existing 16 SP layers will be removed in the next FH2 release just to save times on maintenance. TBH, I don't see a value in most of SP 16 if SP 64 is available with more bots, more vehicles and more fireworks.