What Drew meant by "he doesn't need to improve on anything," is that RR does the things that make a NFL RB great. Drew has spent decades analyzing what goes into making a RB effective at the NFL level, and he's determined that the attributes that a college RB needs to make a successful transition are speed to the LOS, vision, instincts, and lateral agility. RR has ALL these attributes and knows exactly how to use them. That's why he said he doesn't need to improve anything. Also, he specifically says repeatedly that a NFL RB does NOT need speed to be great, but a RB has to have most of the aforementioned attributes to be effective. He says that if you can find a RB with ALL those attributes, and speed also, he will be a 1 in a million player like B.Sanders. But those players come along once in a lifetime. Every time someone wants to slam RR they talk about his lack of speed. Heck, how fast was Emmitt? RR is faster than Emmitt! He may not run a 4.4 40, but you don't need speed to be a great RB. If you're offered Emmitt Smith to pair with MBIII how many of you would take it (rhetorical question)? Everyone of you. The thought of having an Emmitt Smith type RB sharing the backfield with MBIII would make most Dallas fans drool at the mouth. Well, if Dallas is smart enough to chose RR, you better have your bibs ready.
I was about to reply, "Now I'm going to have to squeegee my monitor." But I like your reply better. 
