I can see where Shan is coming from. You got Kurtis Blow, Melle Mel etc etc performing. Can see how Shan may feel a way about a Mass Appeal not asking Shan to perform given he a QB legend and Mass Appeal Nas' company.
Having said that, Nas isn't going to be the one drawing up the set list and asking artists. And if Shan thinks he should be on it because of affiliation to Nas and his impact on hip hop, then AZ, NORE, Mobb Deep, G rap and other Nas affiliated artists may ask where's my slot. Obviously Shan is in that OG category that perhaps warrants a place in set but where do you draw the line