BOS: Apparently Hayward is unhappy in Boston for whatever reason. They flip him along with the two late picks to move up to 6 and select Okongwu. Okongwu becomes their center to match up against Bam, Giannis, Embiid, etc. They also dodge the luxury tax with this move.
ATL: they want to make a playoff push, and this team can easily make an eight seed. Hayward provides secondary playmaking, and scoring. Clark son is signed so when Young sits the Hawks are not horrible. They still have the 26 and 30th picks to get some young guys, preferably guys who are good defensively.