I do think Brissett, Stevens, and Walsh will all have moments for us this year.
Stevens played big minutes for the Cavs in the playoffs. I thought he played pretty well, but unfortunately, he wasn't a great floor-stretching presence and they already had two non-shooters on the court. Next to Zinger or Horford, he could be like a mini-PJ Tucker-lite or Lu Dort-lite. Let him do all the dirty work against opposing forwards/wings.
Brissett is just a good athlete and effective player. I don't see him as a starter, but he's gonna have moments for us. Something like a Juan Toscano-Anderson for the Warriors a few years ago, or a Tony Snell (but better) type player.
Walsh is similar to these other two guys. The beauty is that a guy like Walsh can see the floor more because we have shooting big man. But both Stevens and Brissett will play over him in a similar role. He's going to have to outplay them.
I'm not sure if Gabriel or someone else will be the other piece, but I'd like to see one more shooting big man that can defend the pick-and-roll a bit. If Kornet could get his shooting back to what it was at the beginning of his career, he could work. I wouldn't mind bringing back Theis either, but the salaries are tough to match up. Bringing back Blake Griffin could make some sense also. I'm not really wanting a pure rim-runner though. I'd like a guy who could stretch the floor.
I kinda' wish Ainge would buy out Olynyk as a favor to Boston so he could sign with us, but again, I think being over the second apron that we wouldn't be able to sign him anyway, right? He'd be a really good third big man.
I'm still keeping my eye on the Achiuwa situation (they have Siakim, Poetl, Barnes, Anunoby, and Boucher in front of him, with Young and Porter also on the roster). He's a tough-nosed player who is a jack-of-all-trades-but-master-of-none. I think he could potentially earn some minutes with his size as a second big or stand-alone big.
Random ramblings.