I'm reading a common theme about Cordarrelle Patterson. His knock is that he's very "raw" as a WR and therefore won't be likely to contribute right away. I couldn't disagree with this more.
Patterson is not a polished route runner. He does not have great hands and I do agree that he will likely struggle to put up big numbers in the passing game as a traditional WR going through the route tree. But you know what, very few WR's are.
WR's taken outside of the top 10 selections that put up over 800 yards receiving in their first season are extremely rare. Generally speaking, a top notch WR is a guy who puts up over 1000 or 1200 yards. Basically it is rare for a rookie WR to put up numbers in excess of that of your typical solid #2 type of WR.
So I look at Patterson's ability to return kicks and potentially punts. He'll likely be better than average at both since he was electric in college and return ability is one skill that typically translates well to the NFL. Also I look at his ability to take the ball out of the backfield. He was crazy good in college at this. Finally, he can probably take bubble screens and make guys miss and get upfield. Those are skills that should and generally do translate well to the NFL.
Right there you are looking at more production than the average late 1st or early 2nd round WR. That is a lot. And I might be optimistic but I actually believe Patterson will be able to threaten defenses deep and get open on simple routes like fade/comeback/post. He also is likely to be good on crossing routes.
So even if he does nothing in terms of finding soft spots in zones, creating seperation on outs and digs, and running complex option routes and hot reads, he is still positioned to have a more productive season overall than what most "polished" WR's accomplish in their first season. He was very productive at Tennessee using just his God given talents and ball skills.
If Patterson can manage 500 yards receiving, be an exceptional return man, and rush effectively 1 to 3 times per game, he will have overall a more productive season than most WR's, including Calvin Johnson, in their first seasons. In fact the last WR to win Rookie of the Year was Percy Harving and he didn't even have 800 yards receiving (50 yards per game).
I think Patterson is right up there with any other WR in this class in terms of having an immediate impact.