And the stat that almost everyone mentions that won't get credited to Hyatt is less safeties in the box which helps the run and short to intermediate passing plays even if he only gets one or two catches a game. The other thing is I think he could contribute right away doing exactly what he did in college without having to adjust that much while he hones his skillset as a WR.
Hyatt can come in and run gos, posts, comebacks, slants, crossers etc right out the gate. And like you said his deep speed paired with Cooks is going to make the safeties back off. With Cooks and Hyatt on the outside who you guarding 1:1 while giving Lamb extra attention in the slot? Gluck.
He might not light up the stat sheet year 1 but his game would add a big boost to the O.