From what little I've heard from them they seem purposefully bass-tilted to suit a certain taste. I see nothing wrong with that, but probably a bad purchase if that isn't the sound you're after. They look nice. But that was a quick audition of one model in a box store.
Dr. Dre is just a name. I mean, he's a guy. A rap artist/producer who was in NWA and then solo, and who also acts. But I doubt he's designing these things, though he might suggest what he's after to whoever is. He's like a number of pop artists...with a good marketing sense, he realizes that he can be a brand. So he's a brand and he licenses his name out. Good for him...he's found a way to make money.