I don't know enough about hitting to make an informed analysis, but in my "fan's view" I would say it is not so much a flaw and more like being really bad at pitch recognition. Is that part of being inexperienced? Probably. After all, lots of guys have leg kicks (and other motions) and do just fine. Clearly it is an approach that can be successful at the MLB level. But what eliminating it does for Buxton is give him that extra split second to see the pitch and have a better chance to do something with it. Perhaps with experience and better pitch recognition, he'll go back to it someday. But what it does in the short term is turn him from a near automatic out into a useful MLB hitter. Quite frankly, that's all he needs to be for the next couple years. Useful. Impactful hopefully in the future.