At the end of the day, this IS and SHOULD be a core and basic function of Photoshop. I have used OS X for years. In an enterprise setup however, it is no longer a usable tool. Windows is the platform of choice. TIFF files are not standard in our workflow. PSD is standard. Especially because we have a lot of After Effects integration.
Plane and simple, no one can give a straight answer as to who's issue this belongs to. Adobe or Microsoft? Whoever the fault is with, the 2 should work together to make this feature work properly. It's what....2015? Come on!