I'm working on a Covert Coup review at the moment which covers some of the points you make 4line (can I call you that?). I'm actually with you on the content issue, its relentlessly bland ''I'm baked/in an expensive car'' stuff. Curren$y's lyrics don't really stand out on first listen, either. However, I think what he does with his flow atones for that lack of content/wit. He flows so confidently that he actually disappears a little behind the (excellent) beats on first listen, but on second, third and fourth listen I've come to see it as a brilliant technical performance on his part. I don't think he's ever had (original) beats as good as on Covert Coup, either, as good as Ski Beatz is.
I discuss some of this at greater length in
this blog post on ''Blood, Sweat and Gears''.
Supposed to be reviewing 'Blackberry Kush' too. Haven't listened to it properly yet but it seems great.