Eminem cannot choose good production.
It's physically impossible.
The production on Relapse is great, unfortunately he's been leaning more towards Recovery and MMLP 2 production which, while not bad, don't fit him.
Eminem created magic when he worked with The Bass Brothers. (Examples: Slim Shady LP, Marshall Mathers LP, The Eminem Show, 8 Mile soundtrack)
Jeff Bass co-wrote and produced 'Lose Yourself' for the film 8 Mile. The song won an Oscar at the Academy Awards.
Eminem hasn't worked with The Bass Brothers in years. In my opinion, that's the problem.
I think the last time he worked with them was...the song Beautiful? And that was the only song on Relapse without the accent (and without any yelling).