I am definitely doubling down on Brown being a real impact player this year. I still see people doubting him, saying he's a project and won't contribute this year, but his defense looked great and he can handle the ball in the open court and get to the rim in the pro game for sure, which this team needs. He really bothered the hell out of Crowder and played with a lot of energy.
I also have been saying people underrate one aspect of Turner last year big time which is that he was the only other guy on the team basically who could guard your SFs besides Crowder. Stevens even brought this up in a recent interview I heard. Brown can do that as well. He will definitely get his playing time.
Otherwise, I echo people on Rozier, who looked really confident and like he may be a big impact player. He was coming off screens really well and he bothered IT a lot on defense too. Smart also looked great and I'm super excited for him this year with a much improved shot and good PG skills that we saw emerging in the late season last year. Smart, Rozier, and Brown off the bench will give teams big problems, especially working with the space guys like Horford and Olynyk provide for penetration.