Remember, why would ATL want Burke? Teague is expendable as Schroder is next. Burke will just bench-warm for a couple of years before hitting the open market again so other than shaving a bit of dough from their cap, he doesn't really fill any need.
Burke is a solid back-up and bench spark who will let the team become Schroeder's. In the open market, Burke won't get more than Collison, so it is still a manageable # under the new salary cap.