I agree with most of this but I think there is one other thing worth adding.
Since Day 1 he has absolutely shown a knack for recognizing coverages, finding soft spots and making himself available for Allen when things break down.
He's never going to run by man coverage or present match-up problems for defenses, but his innate understanding of what's happening on the field could make him a more reliable receiving threat than his limited speed would indicate. Maybe sort of the Mack Hollins of TEs.