All right, here's my question: given Javier's first season back, from surgery on the non-throwing shoulder, with rather poor results at the plate, are there grounds for optimism with Buxton for 2020?
Obviously I don't have any specific knowledge of Buxton's case, so I really can't say with any certainty. But, I can give my interpretation of the freely available info. Buxton's issue has been called subluxation, which typically means less significant structural damage as compared to a dislocation. As a result, there is typically not a need for as extensive surgery (when surgery is needed). Because there is usually less damage to the ligaments/labrum, fewer anchors and less tightening of the tissue around the shoulder would be expected. This (hopefully) means easier recovery of range of motion after surgery, which hopefully will lead to fewer problems with overall function and (hopefully) a slightly quicker recovery than more extensive surgery.
It can often take several months for recovery (I think I saw somewhere a 5-6 month timetable, which I would consider about right). Once 'recovered', there can still be some additional time needed to be 'back to normal'. I often specify to my patients that I would define 'recovered' differently from 'back to normal'. Sometimes those two are the same, and sometimes it takes more time to feel 'normal'. On occasion, the joint never feels back to 'normal', but many athletes can adapt to their 'new normal' and perform at a very high level.
So to answer your question, I would expect the surgery to have a more significant effect on Buxton's hitting than his fielding. The magnitude of that difference is basically impossible to predict with any reliability. Despite Buxton's many injury issues, I don't recall ever reading anything regarding him being less than diligent about his recovery, and I would expect this to be no different. My guess is that he will be a full go either at the beginning of spring training or soon thereafter- though obviously many things could happen between now and then that could have an effect on that. For Byron's and the Twins' sake, I hope everything goes smoothly and he is back to his speedy, joy-to-watch self. Dr. ElAttrache is certainly a well-respected surgeon within the orthopedic world, so he is in good hands.