Up until about '03 Em had good song structure and could make a song sound groovy even if it still had the Eminem edge to it.
To be fair tho, he still is technically under the guidance and direction of Dre. Dre produced most of Relapse (I did come around to liking that album), and Exec Produced Recovery and MMLP2. So maybe Dre's ear is slipping in his old age, too. What is he, 60? (kidding but not really)