Yes, Astudillo needs to be on the list. I would have downgraded Buxton to get him closer to Sano (wherever you rank those two they should be side by side). Although, I do hope you are correct that Buxton will have a productive 2019. I am hesitant Buxton will get back on track - mainly as his head is not on straight after not getting called up at the end of 2018. Buxton's struggles on the field have seemed to coincide with mental struggles. Although, I am not sure what came first - the chicken or the egg/Buxton's on-field or mental struggles. They seem intertwined. I think the Twins need to let Buxton play with no pressure, put him the #9 spot and tell him to just play baseball. The mental struggle seems real with Buxton.
And this, it seems to me, is the job of the new manager. Whatever happened in the Molitor era is water under the bridge. It's up to the manager and coaching staff to help make sure that players get the right kinds of support, encouragement, or discipline to make the most of their physical skills. Based on what I've read about Mr. Baldelli, I'm cautiously optimistic.