I love the way this evokes memories of the Thrashers. That's probably not what the Jets want to do as an organization (if anything, they seem to want to bury and forget their Atlanta history) but this would be a wonderful way to pay subtle tribute to those roots without getting away from a Jets-based look. It also, again, is a color that looks OK in the color-rush concept.
The odd thing about this one is you take a radical new look in terms of colours, but combine it with the throwback logo. It looks very wrong to my eyes.
I've thought the Jets should try using a baby blue as a dominant colour (in memory of the old 1948 RCAF gold medal winning team, which is where we 'borrowed our current logo from'), but that would be an even lighter blue than this one, which as you say is very much the Thrashers colour.
My kid is playing Timbits hockey, and each team is given jerseys that more-or-less match the colours of NHL teams (though no logos). I assumed my kid's two-tone blue with burgundy accents was an Avalanche jersey, but the fact that the sleeves were different colours troubled me. A few weeks into the season it hit me - those weren't Avalanche jerseys - they were (in 2016) Thrashers colours!
Honestly, the look itself wasn't bad, and it's not as if the Jets want to totally forget their Thrasher roots. Just look at goalie Connor Hellebuycke, who has a picture of Dan Snyder on his helmet (he's the first Jets/Thrashers player to wear #37 since Snyder).
If the Jets ever wanted to do a one-off Thrashers throwback night, with a Thrashers uni but Jets logo on the front (and Thrashers secondary logo) I think that would be really cool. And naturally - it would have to be against the Calgary Flames.