I watched at least a quarter yesterday of the Rams-Chargers game when I was at lunch, and I thought Goff did look much better. Not that that's saying a ton, because he was awful last year. But I don't think it was everyone around him, from what I saw.
Cupp does seem to have good hands and be solid, and sure, that's valuable. Just don't think he looks like anything special. Watkins will do more for that team than Kupp.
And BTW, I haven't seen Gurley look good yet. Or more like their OL is still prettybad.