He came in and lit it up too fast. He himself admitted he drank the Kool Aid after his rookie year and the work ethic that off season and training camp was very relaxed and overconfident. Week 1 Mike Evans absuses him like a red headed step child and the wake up process began. I think he has learned you can never relax in this league, he has had ups and downs and lacking consistency is his biggest flaws if you are going to find any. Having said that, yeah he is easily still top 5 in CB's around the league. It's just a matter of how good Marshon wants to be, his ceiling is still way higher than he has achieved
You can make an argument that there are no shutdown corners anymore, due to the way the rules (more or less) are slanted to the offense. Then there's the rabbit hole of bad and possibly rigged refereeing that's been talked to death in here.
The "best" at anything is very subjective. Saying "one of the best" is more accurate, because he is. Now if he can continue that for a half a decade or more, that would be extremely valuable to our team.
Now that we have a solid CB opposite of him, I think he'll be thrown on more this year. That could work for him or against him. More balls mean more opportunities to mess up and more stats against you. It also gives you more opportunities to make pass break ups and INT's.