He traded away Rizzo, Bryant, and Baez in their final season on a losing team. Big whoop. He said bye to Contreras after they had known for years they had no intention of committing to him beyond his controlled years, They should have traded him the prior offseason.
Morel has/had 5 years of control, came off a good season, allegedly had a handful of suitors wanting to trade for him, and most likely valued him more than his actual value on the Cubs roster, and instead of going in on that market, he chose to see if it could work at 3B in MLB after 1000 innings of failed attempts in MiLB.
I'm not about to pat Hoyer on the back for his previous moves that were virtually penciled in already. Trading Morel last offseason would have been an infinitely tougher decision than trading any of those players you mentioned. The only thing to give Hoyer credit for would be that he seemingly maximized their value in return, that being said we haven't seen a damn thing yet from those returns and its 3 seasons later. Morel has a ton of control loaded with the potential of his bat, with the others the potential was all used up and it got them a WS... job well done. The problem for the Cubs is that Morels most successful defensive position isn't available.