Sasuke now has two things that only a PS has been shown to have; legs and nose. Thus, a pattern is established. Sasuke is getting closer to obtaining PS if he doesn't have it already.
Anime =/= canon. That part of your argument is invalid. Even if it was in the manga, it would still be invalid logic. Because Madara did not provide evidence that a Sussano with a nose is PS means a nosed Sussano is not a PS. my head hurts. lack of evidence supporting a premise is not evidence refuting that premise. Moreover, a hypothetical does not make a good argument. I don't even believe Sasuke has PS, but this logic is bad.
MS or EMS grants you MS or EMS powers. Sussano is an MS or EMS power. Thus, MS or EMS grants you PS if you can master Sussano enough to unlock it. It has nothing to do with Rinnegan. Madara even used PS in his second fight with Madara before he got Rinnegan.