I am not saying that Eminem has the same flow as before, it's entirely different. Which isn't a bad thing, he has been doing it for nearly 13 years in the mainstream. You can't expect someone to sound the same throughout the entire course of their career, if he wouldn't have switched it up people would say that he needs to change his style up a bit and saying he fell off. Which is the furthest thing from the truth, back on the first few albums he was younger, more pissed off at the world. But now, he is older and alot more mature, obviously his sound and lyrics are going to reflect on that. Could you legitimately see him at nearly 40 still rapping with the same style he had on songs like "I'm Shady"? He would sound like a fucking idiot imo. Times change, and people must also.
edit- I feel there are two entirely different critics of Eminem, they are either blindly loyal nut huggers who treat every album like it's the greatest thing ever, or they criticize every song now because he isn't doing the darker, more angry shit and they want Slim Shady back when let's face it, what he was going through in his personal and professional life 2000 is nothing like what is going on now.