For me, it's simple... I'd like to see him creating more loft and possibly show more pull power.... simply because the games I've seen him in he's not turned on balls he should/could have. But personal beliefs/desires aside.. he is actually showing signs of power as his doubles tend to indicate -- he's not legging those out.. The HR index for RHBs in his home park is 58, more severe that at any park in MLB, but again, you've got Grichuk at 21 muscling balls over that same fence -- also a RH. So while yeah, the park is hurting him, there is data that suggests he should be doing better. If you park adjust and consider his number of FBs that are going for HRs we get a HR/OF figure of 5.9% Vs a league figure of 7.1%. As a bat only position player, it's not really a good sign that he's being outperformed by the league in a power category. People like to point at Trumbo's power numbers in AA and say -- see, it's not out of the question it's just the park and not anything the hitter is doing but, Trumbo put up a park adjusted HR/OF rate of 9.5 Vs a league figure of 5.3 while at Arkansas, so there is a reason to be suspect..
As I said previously, I'd like to see him creating more loft than I have seen to date -- and while I don't want to see him go pull happy, it would be nice to see him actually muscle a ball once in a while.