they are what they are
Not sure that I would do much other than what has been suggested regarding players. I generally like the roster. In fact, I don't trade anyone, unless something falls in my lap. I even re-sign Sam for one more season, and see if Corey is more open to an extension after testing the market, unless another FA can be had for a better bargain, preferably one that can shoot.
The major change that I make is to the strength and conditioning staff. Fire them. Too many small injuries. I have never seen a team with more day to day feet and leg issues. I think some new blood in that dept. would be helpful.
Otherwise, I think this roster, healthy, can advance in the playoffs. Going forward, I adopt the Coangelo, Jr. philosophy of only drafting/signing players if they can shoot. No matter how gifted, athletic, or anything else, if they can't shoot, they ain't taking up a roster spot. No more Rueben Pattersons, and, as good as he has been, Brevin Knights.