They did. They actually do analysis of every trade in MLB. In the Mookie trade, the Sox received more value at the time, as Alex Verdugo alone was roughly equal to Mookie due to years of control remaining (along with, you know, Verdugo being pretty good).
But what that site also made obvious was that, despite columns from the MLB.con and Boston Sprotswriter crew, the Sox were absolutely not going to get Dustin May or Gavin Lux. never mind both. Which I believe one of them suggested would be fair.
From what I saw at the deadline this year, every trade I saw the analysis for was actually very close using their simulator...