I see zero upside in playing him. He will suck and/or get hurt yet again. If they draft a QB I would think they would want Darnold around as a bridge.
Besides, a trade is always possible if the terms are reasonable. Beane got something for TT.
I don’t get why they are so dead set on getting Darnold killed. I would play Barkley and get Darold healthy for next season or wrap him in bubble wrap for a possible trade.