Yes, I covered spring practices when Cooper was on the field. He's small but extremely quick and fast. He's not the kind of playmaker who's going to outmuscle defenders at the line of scrimmage, but he'll get by them with his speed. Prototypical slot receiver who can be used in all different ways.
As for the other transfers, you've got a mix of three FBS Group of Five defenders who have a lot of playing experience in Evans, Green and Elldredge. I'd expect all three to compete for starting jobs, but not necessarily because they're elite talents. They happen to play positions that aren't loaded with much experience or proven talent. And that's why they're on Mizzou's roster in the first place: They address immediate needs. I don't think it's a given that Evans and Green will be better than what Mizzou lost in Ware and Perkins. Ware was a pretty good SEC corner. Drinkwitz was VERY high on Perkins after just a few spring practices.
As for Connor Wood, he played at the FCS level against lesser competition, so he'll face a transition for sure going against SEC defensive linemen and pass rushers. He's got the frame to play the position at this level. We'll see if he's an obvious upgrade over the other tackles on the team.