It's certainly a sign that if he gets the pitch he wants, he can turn on it. Baseball's not unique among sports as a constant game of adjustments. The "book" on a batter changes over time, the batter adjusts to take advantage, the book changes again... OK, I'm not lecturing you or anyone, just stating why I look at that brief shining period he had as a little bit suspect, although also hopeful. If it's true that a larger than average proportion of his homers were bases-empty, then one explanation is that pitchers were challenging him in the situations when it wouldn't hurt them too much, given his pitiful batting average when that streak started. As his record started to show this was a bad idea, maybe pitchers changed, happening to coincide with his thumb injury. It remains to be seen whether Trevor will succeed in making the necessary adjustments. So... more so than other players, he's very much an unfinished project, IMO. We can hope that with good coaching he will find the right balance and get the homers when they are there for the taking and settle for other positive results at other times. But plenty of players have hit a wall during such a period of their development.