Ive never heard of him taking full tracks or anything like that. Dont know enough details about his process or what they actually do in the studio to make claims saying otherwise either. Ive liked most of the music hes put out over the last decade. Just me personally but i like that clean sound hes on at the moment. I dont think it lacks soul, its just more-so a style.
I give him credit for what he actually does. Their are people who believe he makes all the beats himself. Hes not on the level of RZA or Preemo ill give you that but you gotta admit he has something to still be around. Alot of 90s producers have fell way the fuck off or just stopped producing. Dre is still at it to some extent.
That's the thing though. Dre basically buys a bunch of the very best production of an entire coast; it's impossible to completely "fall off" when you're just buying the best shit available and putting your name on it. I can't think of any other artist who so completely dominates a region through influence and hype; you don't see Jay-Z dominating everything about the east coast for instance. Sure the west coast has sounds that have nothing to do with Dre like hyphy and other Bay area stuff, but overall Dre is still seen as That Dude. If someone has his backing, all of a sudden they're The One. And when Dre stops fucking with them, they disappear for the most part. How many major west coast artists have come up since the late 80s/mid 90s movement (Dre, Snoop, Ice Cube) and are lasted more than a couple years?
He invites multiple producers, musicians, and rappers to his studio to jam basically. They create beats and rhymes, he orchestrates everything...then the music is never released.
IMO I Need a Doctor tells you everything you need to know about Dre. He has been living in a bubble for a decade, and when he ventures out he realizes the stuff he's been working on isn't hot anymore. So he grabs a track from someone else, puts his name (and Eminem's) on it, puts the hottest hook chick on it, and boom: a hit.