I think this is awful news for Kincaid. I don't think this Cooper trade hurts anyone more (anyone relevant anyway, sorry Mack Hollins and co.)
I think the 2-TE stuff gets greatly reduced, if not mostly eliminated, and Knox isn't Kincaid's backup. This is a TEBC. I think your average Bills formation is gonna be Allen, Cook, Cooper, Shakir, Coleman (with Samuel mixing in a lot) and Kincaid (with Knox mixing in a lot)
Unless the Bills return to their pre-Joe Brady passing volume (which is unlikely, because why would Cooper change that when it happened when Diggs was still there?) I have a really hard time considering Kincaid a top-10 TE going forward. He may have just seen the most volume he's gonna see going forward. The guy hasn't topped 51 yards all season, adding a clear #1 above him in the pecking order isn't gonna help.