It will be a very hard task for Knicks to beat Pacers without OG and Brunson not only because of the home court advantage of Pacers but also they are already in close match when Knicks has strong line-up with the 2 players is active. I doubt that the current Knicks without Brunson can beat a solid Pacers.
I watched how he took the leadership on those games and it seems like they trust Brunson so much for every decision he is making on every game in this playoffs, since it is working and they're beating strong opponents like the Pacers, it's better be that way, let him be the leader and let him play his game on his own way but honestly, I want to see how will they manage to play against the Pacers without those two and if they still manage to win, then whoever wins from the series of Celtics and Cavs, they're on trouble with the Knicks for sure.