I think people are vastly overrating how productive a rookie WR will be (especially one in the 2nd round). For every Puka Nacua, there are 30 rookies that perform just okay (even good ones).
If we traded for Deebo, I would expect he would out produce every rookie WR in this class (even the MHJ) for this upcoming season. Now, whether we can fit him capwise...I'm not so sure.