Numbers don't tell the whole story. A big part of the reason they went cold is because as the season goes on the other teams start to play a more structured game. As the old says goes the real hockey starts after the all star game.
So what is successful early on isn't necessarily as effective as you go on, especially when your best players are a soft perimeter players. We've seen this for a few seasons now. Fancy schmancy isn't as effective when playing a solid well structured team.
So while the first half they really bought into the defensive part of Bones' system it fell off as the games clicked by. Couple that with perimeter offence it's not a winning strategy IMHO. I believe Bones wanted them to go to the net more and feed the point but as Scheif said that's not his game plays a possession game. So they never fully bought in there.
Thats why we seen a second half collapse I think.
Well, then why did the Jets' expected goals rate improve in the second half? That implies that the Jets were getting more, higher danger shots late in the season, and they absolutely shut off the expected goals against.
Now, if the Jets were getting fewer changes and expected goals as the season went on, then that's one thing. But that's not what happened. What happened was that they were getting more chances, but weren't converting on those chances.
Here are the Jets expected goals per 60 minutes, 5v5, adjusted for score and venue:
Season start to January 14: 2.65 (18th in the NHL)
January 15 to season end: 2.98 (8th in the NHL)
Another way of looking at it is "high danger shot attempts".
Jets were 9th in the NHL from January 15th until season end.
Jets were 12th earlier in the season.
So, what caused the second half "collapse"?
Well, let's start in goal. Despite being one of the best at limiting expected goals against, from January 15th until season end the Jets ranked 14th in save% at 5v5. Earlier in the season the Jets ranked 5th in the NHL in 5v5 save%.
Shooting % (overall):
Before January 15: 11.26 (4th in the NHL)
After January 15: 8.51 (32nd in the NHL)
So, to summarize:
1. In the second half of the season the Jets were generating more shots and expected goals than earlier in the season, and giving up way fewer expected goals against.
2. In the first half, the Jets had one of the top shooting and save % in the NHL, but dropped to last in shooting % and 14th in save % in the second half.
My take is that coaches, players and fans got frustrated by a prolonged losing slump, driven by a shooting and goaltending slump.