I agree with pretty much everything in this post except the bolded. All 3 of those players for Soto would be a massive overpay, considering Tiedemann alone has more median value on BTV than Soto. Not sure what a 450/13 salary commitment would do to his median value though (increase or decrease).
Something closer to fair would be those same players to the Padres for Soto, Kim and Grisham. 51.9 median value out, 59.6 in, still meets the criteria of Atkins usually gaining between 5-10 median value on each trade he makes (at the time these trades were made).