Jonathan Kuminga may have had a strong debut for the Atlanta Hawks, but that doesn't mean that the Miami Heat still didn't dodge a potential disaster had they traded for him. It's hard to imagine how he would've been a good fit for the Heat with how their roster is currently constructed.
Plus, I'm not sure if the Heat would've been so willing to give him the extension he's going to be lined up for. All in all, while Kuminga may have impressed during his first game with the Hawks, it's probably best that the Heat didn't make such a gamble.