I don't see him getting much time as a freshman other than except as a guy to bring energy and play defense....but it's not exactly a stretch saying an incoming fringe top 150 recruit isn't going to play much when only two players graduate.
His projection right now is that of Will Sheehey. Like Sheehey, he was a plus athlete and defender who was not a great shooter coming in. Sheehey was 6'5" coming to IU and grew a couple of inches so he has a couple of inches on Galloway, but Galloway is a better passer coming in that Sheehey was (and ever became).
The you are describing -- moves like Brunk, handles worst than Justin, but is 6'3" -- isn't a guy who could ever play in the Big Ten. I have no idea what player you are talking about, but it's not Galloway.