Walter football had a great take on this pick:
Cleveland Browns: Baker Mayfield, QB, Oklahoma C Grade
*** All reports indicate the Browns will select Baker Mayfield first overall, so I'm going to publish a grade for it. If Mayfield is not the pick, I'll change this grade. ***
This "C" grade doesn't have much to do with Mayfield, as it does the position Cleveland is selecting. The Browns are the first team since the 1992 Colts to have both the top pick and another choice in the top five. They have more top-five selections in this draft than wins over the past two years! They needed to do something special with this pick, and this is not it.
I really like Mayfield. He's a great leader and a hard worker. He's very accurate and mobile. He fits what the Browns want. However, the Browns legitimately liked three quarterbacks in this process. Considering the amount of time it took them to make this decision, there can't have been much of a difference between Mayfield, Josh Allen and Sam Darnold. Thus, the correct move would have been selecting Saquon Barkley No. 1 overall. Barkley would have completely transformed Cleveland's offense, much like Marshall Faulk did with the Rams in 1999. Passing on a special player like Barkley is a mistake.
There's a very small chance Barkley will be available at No. 4 (the Giants will need to trade down or select a quarterback.) However, if the Browns take Barkley first, there's a 100-percent chance one of their three preferred signal-callers would be available at the four spot. This would be a completely different situation if the Browns had, say, the first and ninth picks. They would absolutely have to take a quarterback in that scenario. But they're in such a unique situation, and their inability to take advantage of it seems like an egregious error.
Read more:
http://walterfootball.com/nfldraftgrades.php#ixzz5DqsdHJav