That's just your opinion and interpretation. I see it as the final straw for an older, stopgap player who wasn't producing and an opportunity to give younger guys some reps so we know better how to address the WR position in the offseason. I mean....it's a strong possibility that we didn't go after more FA WRs because we thought King and McNutt could do something. They never had game time to show one way or another. Avant wasn't going to be here more than two years anyway....and that's if he was producing.
I don't think they ever actually believed in King and McNutt that much.
Per Voth, they knew early on that they weren't going to be able to pay what the best receivers wanted, so they'd have to go with role players. And that approach is fine, if you use them like role players.