Well... let's start...
The first and the most basic question : Any Sharingan have the ability to be upgraded to MS -> EMS and can use any abilitiy from the doujutsu?
Why is that? My reasons :
Kakashi and Obito can use Kamui, because both share the original eyes, but we didn't see any of them using Amaterasu or Susano'o.
Neither Itachi or Sasuke showed that they could use Kamui. Itachi probabily learned how to use Amaterasu and Susano'o from the tablet(supposed it shows how to use) and Sasuke magically says "Susano'o" or "Amaterasu' and then BANG... he instantly learned these abilities...Yet, no even Madara could use Kamui.
Last but not least there is the Kotoamatsukami of Shisui, and we don't know if he could use Susano'o or Amaterasu, probaly not.
We didn't see Madara using Amaterasu, not even on the flashbacks.
So how the heck is a Sharingan's user supposed to know that he has X or Y Sharingan's ability?? Even worse how did Sasuke learned to use Amaterasu or Susano'o so fast?
Tell me your thoughts!