There is a long tradition of people giving draft picks a grade less than 24 hours after they’ve been made. Some of them are spot on after the players have shown who they are after a few years in the league, and some of them look pretty bad. A lot of graders get stuck on their personal rankings, and will tank a player’s selection because of that. How a player fits with a team, and their needs plays a big part here as well.
Washington's grades were a rollercoaster throughout the draft. Some people liked the trade down in the first, but the Jahan Dotson pick didn't thrill them.