We should be better than last year.
Brown will have his ups and downs, but any struggles he has won't tank the team.
Losing Sullinger was addition by subtraction. Horford is an enormous upgrade.
Losing Turner hurts, but IMO Rozier will be good, and a little more efficient than ET was. ET was a nice player, but he had some warts too. Let's not forget all the bricked jump shots, especially the horrific .241 3-pt%. A lot of analysts probably have not been following Rozier's impressive development the way we have here, but I expect he has a good chance at equaling or surpassing ET's performance.
For his career ET has averaged 28.6 MPG shooting .432/.305/.777, with 2.2 FTA/5.2 REB/3.8 Ast.
Rozier is also a good rebounder despite being several inches shorter. He is a slightly weaker passer, but is a better slasher and should force more fouls/FT's. His 3pt percentage should be significantly better. He also has better defensive potential, and can dominate physically. I like him a lot.