imo, Norris/Mario: nah.
Isaiah: Debatable, but probably not
Bev brings tenacity and energy on both ends of the court. His defensive impact in the past was a lot better than just this year specifically. But he's sort of trended toward increasing his offensive focus in order to keep up and be able to start within our system. Seems like the end result is mostly just more volume, ha. but his 3% is the best it's been, so there's that. Said system doesn't really penalize guys for not playing defense, so Bev is able to play it in spurts like he has done this year. He's had some lapses that he didn't have in the past. But either way, his energy alone is pretty elite for a PG. When he wants to clamp up, he does it better than most. Isaiah would bring us more scoring, but he's small and I'm not sure how well he would play off the ball (which is what we'll need considering Harden facilitates).
If we're going to upgrade, imo it's going to have to be somebody that can score of the ball well, have some size, and play some sort of defense.