I don't recall anyone saying it was a great trade.
I recall hearing things like this...
"Bloom must really like these prospects..." (not the same as saying these prospects are going to be good.)
"Bloom must think JBJ will bounce back..."/ "Bloom must think Renfroe will regress..."
"The cost of Renfroe's arbs lessens the fininacial cost of JBJ's contract..." (not fully, of course)
On the Betts trade, one could argue we won the trade, even if the prospects give us zilch. 4 years of Verdugo vs 1 year of Betts (a year we finished nearly worst in the league.)
The JBJ trade may be rated based on how well JBJ & Renfroe do, without any input from Hamilton or Binelas.
The Beni trade was basically all about prospetcs- none of whom have given any pluses in the bigs... yet.
The Sox don't have many examples like VTek & Lowe, because we are usually the ones trading prospects for experience, but there are countless examples where the prospects contribute enough to tip the scales.
Of course, there are countless examples where they don't, as well.