I don't have much faith in any marked improvement in smart and I also think the way we are built Stevens will bury brown on the pine. Hopefully he lets Olynyk play more this year and Rozier who should never have had only garbage minutes. For me, it's a big year for Stevens to stop playing guys with no future here ahead of guys with serious potential.
I really don't get why you think Brad doesn't play guys with "serious" potential. In his 3 seasons, we've had 4 first rounders. 2 of those players (KO and Smart) played a lot (one even starting on a playoff team), while the other 2 (Rozier and Hunter) barely played. The difference is that the 2 that played were actually NBA-ready lottery picks (and contributed right away), while the other two were longer-term prospects, and arguably not on the same level as prospects.
Brown, on the other hand, is both NBA-ready (body-wise) and a high-caliber prospect. There's no reason to think that he won't get playing time, ESPECIALLY when you consider that SF is not a deep position for us.
And, frankly, if he can't earn minutes over Gerald Green, then he shouldn't be getting them. If you can't show anything in practice/games, you belong on the bench