It's definitely a surprising trade. Some Avs fans - regrettably, myself included - had hope that Jost could be a 3C for Colorado after his strong season last year. The numbers on the surface don't look great (17 points in 54 games), but consider that in his final 28GP he had 14 points with a +15 rating while exclusively playing center. He also was decent in the circle (46.8%) considering how notoriously bad he's been there.
Clearly that was smoke and mirrors due to a combination of playing in a weak division + playing with Valeri Nichushkin, who props up everyone he plays with. This year Jost has been brutal, 14 points in 58 GP with an abysmal 39.3 success rate on face-offs. Colorado's PK also stinks, and while that's not all on him, it's worth noting considering he plays there.
I wish him all the best in Minnesota but am simultaneously glad he's no longer living rent free in most Avalanche fans heads.