Yes, the team needs a quick reload. They have several young veterans--Sanó, Buxton, Kepler, Polanco and Berríos--to go with the two rookies--Kirilloff and Larnach--to be decent if they can somehow get league-average pitching. More than half of the pitching staff needs to be rebuilt. I would think that the Twins need to sign a couple of quality arms in the offseason, but the farm needs to produce as well.
When Buxton is not playing, one element that is sorely lacking is speed. Watching KC take extra bases and demonstrate range in the field really shows the contrast. Twins not only don't steal many bases, they don't go first to third on singles or score from first on doubles or from second on singles for that matter.
IMHO, Kirilloff and Larnach will be mainstays for a long while. It would be fantastic if Royce Lewis could develop into a player with skills commensurate to his tools, that would be some nucleus. Of course, the pitchers need to be developed, as well. It seems many are doing very well in the minors. I hope we can see some advancement the rest of the year so that there can be help next year.
I'm afraid the Twins won't have Buxton when they are good again. It's a pity, because this season, for the first time, he looks like he has found himself as a hitter to go along with that speed and defense.