I am ambivalent about this. I firmly believe that it’s on defenders’ shoulders if they aren’t ready for a disc to be brought in in non-check situations. However, you are right that ambiguities about where the disc is coming in are problematic. That said, ground taps are not free and I would prefer to allow throwers to keep that first second of their stall – being able to take advantage of lazy defenders is a feature, not a bug.