Maybe DaSilva didn't notice.
Tutu needs to get out in front of his defender, maybe where theQB's vision is partially blocked, and have the QB drop the ball into his lap, in stride, on posts and wheel routes, etc.
Stafford can do that better than other QB's - but Tutu's stature nonetheless limits his adaptability on the field and versatility when plays are being drawn up. McVay is finding multiple ways to use him, but face it: he's not an all-round receiver. He's a specialist in anintricately refined system.