You've all made good points. Technically, I don't think Cube's fallen off...I think he's now just focused on more things than just music, because he sees that the kind of records he's into making probably wouldn't come out without a fight from the record company. So he's working in a field (films) where he can at least be allowed to do more of what he wants...
One question that often comes up is "why did Cube stop making the political, issues-oriented records?" Cube has said that he got frustrated w/ how the media raked DEATH CERTIFICATE over the coals in '91. He said that he put it out w/ the intention that folks could learn something about the problems the ghetto was having and what folks needed to do to solve those problems.
But all that the media (and many listeners) cared about was making him look like a monster because of "Black Korea" and "No Vaseline." When WAR came out, Cube told THE SOURCE (and I'm paraphrasing), "for them to only zero in on 'No Vaseline' and 'Black Korea' told me that they didn't really WANT to focus on all the other problems DEATH CERTIFICATE addressed. They just wanted an excuse to create controversy. So that kind of left a bad taste in my mouth...why should I stick my neck out just for people to see it get chopped off?"
Thus, we got THE PREDATOR--which was more skills-oriented (although there were a few political things); LETHAL INJECTION--Cube tried to adapt to G-Funk; WAR--basically a weird attempt at combining Southern Rap sounds with European/Gothic/Industrial music, and PEACE--an attempt at combining dance-rap with old school gangsta.
IMHO, AMW, KILL AT WILL and DEATH CERTIFICATE were perfect from start to finish. THE PREDATOR, LETHAL INJECTION and WAR AND PEACE all had some classic cuts that were as good as anything from the early days. The problem was that all four of those CDs ALSO had songs that would have been classics coming from someone else, but for an artist of Cube's calibre, they seemed weak ("Limos, Demos and Bimbos", "Can You Bounce?", "Down For Whatever" come to mind). The songs that were less-than-great kept those CDs from being as good as they could have been. Those four CDs would fall into the category of "well worth getting if you're a fan, but not QUITE dope enough to be classics" (although THE PREDATOR comes close).
Still, Cube can't be overlooked for all that he has accomplished as an artist, and he has made some good movies, too (BOYZ N THE HOOD, the first FRIDAY, THREE KINGS, BARBERSHOP). PEACE!