Maybe they are adjusting their thinking after the Moncada-Swihart decisions.
Many of these types of decisions have been made out of an intense big club need- some have worked, others have not.
Here are a few recent moves I recall:
Middy: I don't think they rushed Middy, and I was one who was not taken in by his super hot start to his career. His minor league numbers were larger and revealed some big issues.
JBJ: He was yo-yo'd so much his failings could have been attributed to motion sickness. He put up some great numbers on the farm and in ST'ing. I was never one to think he was called up too early, though. I was also against playing him in LF, when he is such a great CF'er. (Note: I don't think playing LF contributed to his early struggles.)
Bogey: I was very upset they only gave him 10 games at 3B before thrusting him into the intense playoff run spotlight off position. To me, that was severe short-sightedness. This isn't revisionist talk either, as I was calling for him to get more reps at 3B on teh farm long before they finally gave him some. We had a great need at 3B, and everyone knew it. This one worked out well in 2013, but not so well the following year. Many (not me) feel keeping him at 3B in 2014 messed him up at the plate.
Betts: Although Mookie did get 46 games under his belt in the OF before being handed the CF job with the Sox, some felt it was a lot to ask of a rookie. He showed he can handle anything thrown his way. What an amazing athlete. His move from CF to RF was just as seemless.
Swihart: He did a great job after being rushed to the bigs after the injury to Vaz. Some feel we gave up on him too soon, but I think the pitching staff greatly preferred Vaz as their battery mate. That's something us fans might not be privy to. The move to LF was understandable, IMO. We had lost out on obtaining a LF'er at the deadline, Swihart was looking good at the plate, and the idea of moving Swihart to a new position has always been "on the table". The move was made quickly (again), and had Blake not gotten hurt, I'm not sure we'd be talking about it right now.
Moncada: I felt his bat had been ML ready for many weeks before his call-up. My concern was always about his glove. I never felt his position was going to be 2B, but they kept him there all along. Then, suddenly, they move him to 3B and call him up shortly thereafter.He only played 10 games at 3B in the minors before his call-up! For a guy who struggles with fielding, this was absurd, IMO, unless the plan all along was to just DH him after his call-up. He ended up with 35 horrible innings at 3B.
Beni: I treated the Beni call-up like I am the Devers one now. I thought he was ML ready, but said I "trusted Sox management" to know when is when. He's done very well since that decision, but many felt it was rushed, and a few felt it was a "panic move".
All in all, IMO some decisions are made more out of need than "readiness", but a balance usually called for. I don't see there being a pattern of mistakes being made.