It's never too early to look at some stats. Jai Miller homered today, leads the team in OPS (discounting Baez's 1 for 1, 2.000 OPS) and is creating a bit of a stir. But, he also leads the team in strikeouts (9, Josh Bell is second with 6). If I'm calculating it correctly, his BABIP is .700. A more realistic BABIP would yield much less favorable hitting statistics. A K rate of 9/21 would net out to well more than 200 strikeouts in a full season of at bats (257 in 600 at bats, for example).
So, I'm just throwing this out there to point out that the early returns on Miller don't appear as favorable as all the hits may suggest (that is, to put any stock in spring training stats at all). It's not Jake Fox's wind-aided home run barrage, but he's probably benefiting from a similar kind of luck, and the strikeouts are discouraging. The odds are still long on his being a useful player.