Nas spitting shyt that's not really his type of shyt over beats that ain't his type of beats + 2 super average Mc's and Az.
Then Dr. Dre producing shyt that's really not up his alley for that matter.
The album didn't make sense.
Based on everything about the album except Nas and Az being on it and Dr. Dre producing it.. It all sounded wack from the beginning.
If it was only Az and Nas doing what they do so well, street poetry.. It could've been, should've been and probably would've been a dope album.
It's like Jay-z, Talib, Rocko and Pusha-T doing a backpacker/socially conscious album with Swizz Beatz producing it..
And like the man above said, Dre has handled like 12-13 full project albums and a majority of them are era-defining classics. Few producers in any genre is fukking with that. Over 3 decades, with completely different styles of production, emceeing and on.
Also mixing emcees does not necessarily make a good mix, not even good emcees. You can make a great cocktail with 1 liquor, sometimes with 2, but the more you add the harder it becomes. Wu-tang, N.w.a. and Bone-thugs-n-harmony