FWIW 7 months of development time at that age can make a huge difference.
From what I've read on him before he was drafted is that he has bust potential because he has trouble hitting breaking balls. However his swing has crazy power so if he figures that out he could be the real deal. He seems like a true boom or bust prospect.
The good thing is, he is young so there's plenty of time to get in more at bats and one month of playing tells us next to nothing.