Powdery Mildew? Mold? Something Else?

[JamesL]

I have been on cruise control all summer. Everything green. Cautiously optimistic that I was going to slide through August in the same manner.
Alas no....
Went out of town for a few days and came back to what appeared to have been a bad case of Mildew or Mold along with some heat stress.
Also have a touch of EB/Septoria on one plant. My neighbor has had it from the beginning of the summer but I have managed to remained clean.
Temps topping 90 as was the humidity. Sprayed Sunday morning with Actinovate and Exel. By the end of the day it had gotten worse. Powdery spots would rub right off. The full bottom 3 ft of a Goose creek had gone yellow.
I aggressively pruned off almost all of the yellow, etal.
Broke out the Greencure (unused until now) and sprayed Sunday night and Monday night.
Sprayed Actinovate and Exel again tonight.
It would appear that the Greencure did the trick and I believe any additional yellowing is just hangover from the mold/mildew being killed?
Any whitish spots showing today were dry before spraying tonight, no residue coming off.

Am I on the mark with this diagnosis? Thoughts anyone?

Pics -
1 and 2 are 7.4 vs 8.6 comparison
3,4 & 5 - Brandywine Suddath's
6 - Rowdy Red
7 & 8 - Additional yellowing/browning today
9 & 10 - Goose Creek comparison 8.6 vs. 8.8