Hawks wouldn't trade a 22 yo 20/10 guy shooting 40% 3pt for a broken down 30 yr old wing who doesn't fit their time frame...Especially on a 1 yr contract with the ability to overpay him and give up no talent next fall.
That said, Atlanta should definitely want Smart (and prob the 14). He's a culture changer which is exactly what they need. If they get a young PF at 6, say Toppin. And have a target at 14....then that trade is a slam dunk for them. Smart is a young leader, all defensive muscle to pair with Young's scoring. Add Hunter, Reddish and Toppin's athleticism on at the wing/forward. Overpay for a vet PF/C like Ibaka along with Capella and Huerter and the 14th pick... they'd have a squad that could compete in the east next year and still have cap room to add a FA next fall (Hayward perhaps haha).
As for the C's, Collins makes a ton of sense, even if it requires an overpay for the Celtics. He fits the Brown and Tatum timeframe and his strengths/weaknesses seem to fit the team and system nicely. Three big, athletic 2 way wings/forwards under 23 who can all shoot? Yes, please. Collins 3 pt shooting will spread the floor, he can run the pnr and finish at the rim. Atlanta seems to want him to be more a shot creator and defensive stopper, which he is not...but he doesn't need to be that on the C's. He can move his feet, switch and block some shots...our system will hide some weaknesses. It also allows us to start our best 5 (Walker, Brown, Hayward, Tatum, Collins) by moving Theis to the bench it adds some big man depth. It would also open the door for Langford to get some run and unlock some of that potential he has shown.
I hope Ainge is targeting Collins...and Atlanta is impatient enough to move him.