Beaulieu is once again the leader in +/- on defense, as he was last year, which is likely not coincidental watching him play, and now sports the best PK metrics on the team, with the most minutes, among d-men who have played significant minutes in that role. I don't get why it's dead horse to beat on this guy, when the results are there.
The Jets aren't a developmental team. They play to win games. And putting out the best roster players available is how you do that.
There's no tangible evidence that Samberg is better than Beaulieu, the preseason scrimmages did not indicate that either. Beaulieu's probably evolved into a safe enough player to remain in the lineup, at this point of his career. His decision making is much better than his Montreal days. He's also the toughest player on the team after Lowry, who seems to be evolving away from a goon role, as good hockey players tend to do.
There's no race to get Samberg into the lineup. Definitely not a race to get Heinola into the lineup. If they followed every other d-man drafted by the Jets (other than Trouba) they would get a significant taste of the minors to help their development. That's the likely route, as the model has paid dividends.
I'm looking forward to getting all of Samberg, Stanley, and Heinola into the Jets lineup, at some point, but I would be skeptical of that timetable being now. Stanley looks more mature. The analytic info is conflicting on Heinola, as one would expect, with a young player, still maturing. Samberg will get his chance, and when he does then we will be able to have a proper analysis of where he is at. I'd be inclined to believe that management and coaching will get it right with the development of these pivotal young players.