I wouldn't point to Grisham as developing a good hitter since he isn't one. No one is throwing in the towel on any of our rookies but I don't see any of them becoming great offensive players. Turang is eventually going to be the shortstop and the defense will play but the bat is just not there.
Some of the prospects look promising but the system as a whole isn't very strong with hitters or arms. Stearns started off great but he tailed off dramatically at the end and the organization looks to be in a weak position moving forward especially if they aren't able to cash in on Burnes, Woodruff, and Adames and lets face it Burnes is not going to bring us a huge return if he continues to pitch as he has.
Its great to have optimism with this organization but the only bright spot I see is the division being terrible.