ATL was set up perfectly for the Murray trade.  They had picks and a not-fully guaranteed matching contract.  We wouldn't have been able to beat it even if we wanted (which I doubt we would have).  Burks is no big loss.  It is a gamble of course, we have to actually find something else, but I am not loosing any sleep over Alec Burks.
The Celtics are generally cautious.  This off season will be no different.  I think there will be moves but likely not big enough ones to satisfy all fans.