To clarify, those low numbers you see on the chase rate and whiff rate scales from Baseball Savant mean that he is worse than league average on both of those metrics. In other words, he is still chasing and whiffing more than most MLB hitters. Now, his stats in pretty much every other hitting category are obviously elite, so while he still might chase a little too much, he is making the most of the pitches he sees in or near the zone. I imagine pitchers will notice this eventually and start trying to get him to chase more, which is when Buxton will need to be able to adjust or risk seeing his success drop off quickly. The next step in his evolution at the plate will need to be improved plate discipline which should lead to a higher walk rate. If he can make that adjustment without sacrificing too much of his power and aggressiveness, his success should be more sustainable long-term.