Brown took 12 three's last night and took only 18 shots total. For a player as strong and athletic as he is, that's not a good ratio. If he had gotten incredibly hot, then maybe, but he wasn't last night. He should've been attacking like he did in Cleveland in Game 6.
Rozier, same thing. 10 of his 14 shots were three's and he missed all of them. Obviously missing that much is an aberration but when the jumpers aren't going down, he (and Brown) need to know how to get themselves going.
As others have said, it's not the shooting, it's the decision-making.