I wouldn't mind it if it was saved for the finale.
Spidey needs some extra distance to get to the final confrontation or something, and launches himself, and then we see the webs giving him the little bit of extra lift (or slow down his fall) that he needs. Nice little nod to the fans, and something not in the trilogy.
Why do we keep pointing out that it's useless/pointless? It's not SUPPOSED to have a point. Neither do chest symbols, bat-ears, cowl wings, CAPES (in most cases) or lightning streak markings. They're a decoration, nothing more.