Yeah, Doc's flow really changed for the worst with Bombay. He was never a great lyricist and some times it seemed like he didn't even rhyme but old songs like "Guess What's Growing In The Gardens," and his verses from Season of da Siccness are good examples of the presence Mr. Doctor had on a song.
With Bombay it's like once Doc stopped rapping about the Gardens, he had nothing else to say. Thought Doc Holliday would be a return to form but most of the beats were even worse, with one of them being the Austin Powers theme song.
The only good post-Setrippn Bloccstyle songs are on Assassin's Born and Raised in the Bay, Savages, Foe Loco and that's it I think.