I would say they inherited some good, young, big names and a lack of depth / lot of holes to fill, as evidenced by the large group of players who were with the team in Year 1 that are now completely out of the league.
Still here:
Ladd, Wheeler, Stuart, Burmistrov, Little, Thorburn, Pavelec, Byfuglien, Enstrom
Added & Currently Playing:
Trouba, Ehlers, Myers, Stafford, Scheifele, Perreault, Lowry (31 games out of 34), Copp, Chiarot, Peluso, Hutchinson, Petan, Hellebuyck, Halischuk, Armia
Gone during Thrashers / Jets transition:
Boulton (not re-signed in the Thrashers/Jets transition off-season, still playing in the NHL) & Stewart (not re-signed in the Thrashers/Jets transition off-season, only played in the NHL one more year)
Players inherited from Thrashers, or who signed with the Jets prior to / during Year 1 & are no longer with the team:
Slater (SWI), Wellwood (SWI), Stapleton (SWI), Miettinen (FIN), Glass (AHL), Kane (traded), Bogosian (traded), Oduya (traded), Hainsey (not re-signed), Fehr (not re-signed), Jones (UFA/AHL), Flood (AHL), Mason (GER).
* Note: Lists (excluding this year) are based on minimum 30 GP, and less for Chris Mason since he was the undisputed #2 goalie.
No, Jets management hasn't been perfect, but their mistakes (so far) haven't involved losing a valuable player that was on their roster when they bought the team, and getting nothing in return. Comparing the first two lists with the last two, so far management has made upgrades, even if it's not reflected by this year's standings.