I'd say this has been a transition year, though not to the extent we were hoping for. No Buxton or Sano makes things a bit less...exciting, but let's not forgot the changes the Twins DID make.
Kyle Gibson looks to be maturing as a starter and could be a quality #3 starter for years to come. Danny Santana has gotten a good shot this season and has excelled. Kenny Vargas is up and getting a shot at the DH / 1B job. Trevor May will get a handful of big league starts under his belt this season, which will help him grow (hopefully a lot like Gibson this year) into next season.
The team has also moved expiring contracts for young pitching. Willingham and Correia have been flipped to other teams. I think the Twins have more pitching depth now than they've had in a long while. Milone, Hughes, May, Meyer (eventually), Gibson, Thielbar, Presley and Tonkin all shape up a young pitching core that could soon see additions like Burdi and Jason Adam join their ranks.
There's been a youth movement this season - maybe not as aggressive as we all would have liked, but the changes have been made. I'd say this was certainly a transition year.