Smart and R Williams are both pretty dynamic game-changing players. They come in the game and the other team has to adjust to them. Having two players like that off the bench is pretty rare. Robert Williams has another level to go. Grant Williams is a solid team NBA player that doesn't hurt you. Ojeleye is a one-on-one defender that can make the opposing team's wing miserable on offense.
The only thing this team is missing is a high-level bench scorer--the Brad Wanamaker position. He's been better than this forum gives him credit, but he is a guy, nothing more.
If this team started Williams and Theis with Brown, Tatum, and Walker, and brought Hayward off the bench, people would feel a lot different about our bench. CBS rotations are essentially that, unless he is trying to force the development of the bench guys or get rest for the starters.