Ill make some comparisons to my favorite artists who released albums after the classics and lost their steam
Snoop - Last meal was the last album I could tolerate and hes had many since then - Blue Carpet Treatment was a BANGIN album and he has had pretty solid releases since LM.
Ice Cube - Lethal Injection Last good album - debateable, Laugh Now, Cry later had some 10 top hits on it, and was a tight album.
Spice 1 - 1990 Sick and many many flops since then. agreed
MC Eiht - Death threatz. agreed
C-bo - Till My Casket Drops - Dropped Enemy of the State, which is arguably one of his best album - along with that West Coast Mafia album which was sick and Moment of Truth
BONE - BTNH Ressuerection - Strength and Loyalty was pretty good - and they are about to make a strong comeback (maybe)
e-40 - Charlie Hustle - this is very debateable, Breaking News was a slapper, and MGRC did very well. Not as good as the old ones, but still very good material