I think fans tend to have unrealistic expectations for new juco transfers. The transition is massive for almost all of them. Vincent Grier was an exception in part because he is/was very talented, but also because he played DI at an almost-high-major level at Charlotte.
Most jucos have a huge transition because the game is very different. The stereotypes about juco basketball have a lot of truth in them. The pace is fast, the defense is minimal and for the best juco players they have their offenses run around them. Twenty-shot nights are not that uncommon for talented juco players.
Now they come to a high major DI program and they don't get 20 shots a night, the defense is better, they're expected to play defense and they have to adjust to not being the total star. In addition, there is way more coaching at the DI level.
Here's a stat line for you: 6.8 ppg, 7.0 rpg. What is that? Those are season averages for the juco national player of the year before Bostick. Who? Jamarcus Ellis at Indiana. I'm not saying that Ellis is the same player as Bostick or better or worse. I'm just writing that as an example of how the transition is difficult.
Now regarding Bostick, I don't think he's going to be a difference-maker. I think he'll be a productive player to a very productive player once he gets comfortable and figures out what end is up. I guess I'm still hung up on the whole Youngstown State thing out of high school. That doesn't make sense to me.
