So, in essence, my proposal would be to consider Metcalfe's adjusted model as a second tool to predict price variation and eventually to increase confidence in the logistic model during times when price under-perform instead of repeatedly questioning the validity of initial assumptions.
Please comment/criticize.
I believe that a good time to revisit both models, beyond keeping them up-to-date, would be somewhere near the bottom of the next bubble. Perhaps in the late fall. By then we should see more adoption for ordinary transactions and perhaps a lesser proportion involving an exchange. Likewise with the worldwide growth of the Bitcoin Economy there will be more opportunity for small world effects to disconnect the Metcalfe Law model from its up-to-now very close fit to prices.