Nice thread resurrection, @angerdan
So in truth, to return to the original poster's question, five years later there are actually NO new DFA* zooms, and in my opinion there is still no urgent need. The Tamron-based 15-30 and 24-70 have proved to be excellent performers, and the 150-450 (which would get a star if not for the variable aperture) is superb. We have also gained the incredible DFA* 50/1.4 and DAF* 85/1.4 primes.
As to the desire for a refresh of the DFA* 70-200/2.8 - there's no chance at all. If you really need slightly faster focus, we now have the DFA 70-210/4.0
I think this thread could safely return to the grave.