I took at look at JD's coaching moves history, and he was more patient with Richards in Columbus (three full years, then fired early in the fourth) than he was with the Blues (Kitchen, Andy Murray and Payne all were fired in-season, with Payne after only 13 games in his third season). At least we know he's not averse to canning a guy early.
JD's team-building mandate likely is in line with Gorton and blessed off by Dolan -- ease the kids in no matter what the standings say, promote accordingly based on production, increase their roles as the season progresses. I'm pretty sure JD wrote this year off as a rebuild considering his Shattenkirk move, the inheritance of Smith and Staal (and to a degree Lundqvist), plus two valuable UFA in Kreider and Fast. He probably targets 2022 or 2023 as his contending year.
The Blues missed the playoffs in four of his first five years, and lost in Round 1 the other. Wasn't until 2012 when they became a powerhouse, and five of their top-six scorers in 2012 were original Blues draft picks between the ages of 22 and 27.
With Columbus, he missed the playoff three of his first four years and lost in Round 1 in the other. Davidson's FO history shows that he's generally patient with younger players and probably advised his coaches to do the same, unless they produced enough to get a promotion.
Look at his Blues tenure.
Perron averaged 13:07 his rookie year.
Backes 13:25
Berglund 14:43
Pietrangelo 16:33 his first two 9-game call-ups
Schwarz 12:22
Cole 16:46
Then with CBJ
Johansen 16:05
Jenner 14:05
Wenneberg 15:37
Anderson 12:01
Dano 13:15
Now the NYR
Fox 16:34
Hajek 15:29
Kakko 14:34
Last year (pre-JD)
Howden 14:56
Chytil 13:47
Andersson 10:43
I don't know. Even if Quinn is fired, I don't see these kids hitting major benchmarks for another season or two.