First of all he was always overrated, and he was never "the face" of The League...
He was a novelty in an offense that wasn't well constructed so he stood out. For all his stans, I'm not saying he was ass, but he was never truly "great". He was the Giants' bailout option and had the speed and strong hands to make the splash plays. What else did he do at an elite level?
At his peak in his first 3 years you could argue he was #3 but at no point was he ever better than Julio or AB. He played for the Giants, so of course people hyped him as the next great thing. He was never Randy Moss and Julio is the guy from this era who has Moss-like comps...
Add to the fact that he started getting hurt more and had a garbage QB that kept getting worse, and a poorly designed and run offense that couldn't get him the ball adequately, and he fell more in love with being a celebrity than being a great football player, and there you go...
He peaked early, we've seen the ceiling. That ain't coming back but he can turn into Wayne 2.0 or something along those lines if he's as dedicated as he's been saying. You have to be able to develop the appropriate chemistry with your quarterback too, you can't throw fits when you dont get the ball and you can't be a one trick pony. Baker isn't the problem, but the blame for lack of connection falls on them both. If he can't establish the rapport he ain't getting a pass, but for me simply put, he was never quite as good as people thought, he just stood out more because of where he played and who he played with...