Watching this Jay-Z Breakfast Club interview, it's great. Definitely agree with him on the NY rap scene. Personally I think NY rap's scene is doing great right now, from Roc Marciano to Exquire to Action Bronson. The problem is that there isn't a "big" NY rapper now. ASAP Rocky is popping but he doesn't really strike me as "New York" despite being a flashy Harlem nicca; IMO I think he's a flash in the pan type of artist who won't be relevant soon.
So many NY artists are hell bent on following the same old blueprint on how to come up, and many can't write songs. I think Exquire and Bronson are dope for instance, but both struggle to write "full" songs; they often don't have choruses, or if they do it's the same couple words repeated over and over. NY used to have a very solid understanding of melody and how to make a catchy hook. 36 Chambers is still one of the grimiest albums of all time, yet it has multiple catchy hooks (Cream, Method Man). It also has some more hardcore hooks that work perfectly live (Wu Tang Aint Nothing to Fuck Wit). Today rappers treat the hook like it's a mini verse or some shit, creating some 4-8 bar mantra that can't get a crowd hype.