Getting old is not the same as falling off.
Ghost has just calmed down his flow, hut you can tell he loves making albums and he always tries new shyt. The only other rapper I can think of who has managed to maintain that level of creativity while getting old is MASTA ACE.
My goat Nas really gets by because he's just too ill with it, Pac dead. Ghost my number 3, but he's more creative than Nas.
Cube is my number 4, now there's a nicca that fell off - for every dope rap he spits he'll have 10 generic ones, THAT'S falling off to me. When rappers stop trying/innovating and start recycling. Cube/Snoop/Prodigy/...
Ghost slowed it down but even on the latest Wu album he showed more energy. His concept albums INTENTIONNALY go for different kind of raps - Ghost can't do that SC/Ironman style on Badnotgood/Damian Younge.
If his flow is off on Doomstarks or SCII that's when I'll have to re-evaluate.