That's what I do - I rate trades on when it happened knowing the information we know.
The Marlins deal looked pretty even I think. Johnson had a good year, and there was no way we knew he'd implode the way he did in Toronto. His velocity wasn't even all that bad. Reyes we knew he would be injured, but there were also freak injuries with him.
The guys we sent such as Nicolino were on the lower spectrum of our pitching depth. And Hech was a guy you don't really hold on if you needed to part with him.
Alvarez hurt the most - I really liked him.
As for the Mets trade - I have no regrets whatsoever. Dickey had several great years including his Cy Young year. Yeah he was moving over to the AL but he also had great numbers against the AL east and in domed stadiums.
Syndergaard at that time, and especially on this message board, was rated lower than Sanchez. If I recall, no one liked his flat fastball and his curveball wasn't wipe out. Obviously that has changed now, but Syndergaard was part of the big three that was also expendable. And we were able to get a Cy Young for him.
d'Arnaud hurt - yes. I fully expected him to do well and he has so far. But you have to give up something to get something.