Duke's now got the tiebreaker over GT (who still has to play UVA and Clemson) and UVA (who still has to play GT and FSU). All three have only 1 ACC loss.
Duke's remaining schedule:
At Pitt (4-3 overall, 2-1 in conference) same division
At Syracuse (3-4 overall)
VT (4-3 overall, 1-2 in conference)
UNC (2-4 overall, 0-2 in conference)
Wake Forest (2-5, 0-3 in conference)
Pretty much Duke and Pitt control their own destinies as far as the Coastal currently goes. (And Pitt has GT, Duke, UNC, Syracuse, Miami).
That division might come down to the game between those two on Nov 1.