He should use a vice similar to the one he use's in the following songs:
--Beautiful (Not yelling and no accent)
--The Warning (Pretty close to old Eminem IMO)
--Ridaz (This is a decent balance between vocal intensity and flow)
--Cocaine (Relaxed natural voice)
I think when he uses his calmer voice without getting so close to screechy and without the corny accent he flows very well with beat's and will appeal to more people. Thoughts?