TBH, I will not also be surprised if the Hawks will undergo into a rebuilding phase and will also trade Trae Young to get draft picks and some players. With their number 1 pick, there's a chance that they will build around him. Let's see how the Hawks management will make some adjustments, but I believe Young will get traded as well soon. 
I'm not sure that the Hawks management will start rebuilding the team so abruptly. Otherwise, they will be at the bottom of the standings for the next couple of seasons. It's worth noting that Young has 2 more seasons left on his current contract, and it seems to me that the Hawks won't trade him until at least next offseason.
If that's the case, then they will try to compete again next season, but now instead of having Murray, they will have Risacher as his duo. TBH, I don't expect too much from a rookie player since they're still rookies. Wemby is an exception for that of course because he's just an alien came out of nowhere. I'll keep my expectations low for this year's top 1 pick - or at least the Hawks will not clinch the playoffs again this season.

~ while PG13 goes to the Sixers.
I didn't see this coming. I always thought that PG would be willing to sacrifice his salary for another run at a title but it seems he's trying to maximize his remaining years as a competitive player. Things with the Clippers might not have worked out but it's still a win-win situation for him because he landed on a decent team
The top 3 teams that really wanted PG are the Clippers, the Warriors and the Sixers so this is no surprise (at least for me).
PG don't want to return to the Clippers anymore hence, he opted out in his contract. The Warriors wanted PG13 in their team, but they don't want to include Kuminga in the package, but the Clippers wanted him thus, no deal has been done. Sixers has the cap space enough for a 3rd star, and now they got one already.