Indeed they have! Just tested all three problem areas outlined in my original post here - the 76T area, the Melbourne, FLA KMLB area, and the one NW of the Amelia Earrhart K59 airfield, KS - and all of them have steady FPS in the 70’s for me.
What’s more, several other locations I was troubleshooting - that WERE NOT clearly associated with Class B Airspace so far as I could tell - also appear to have been fixed. That’s great to see.
This seems thus far to be a very good hot fix, with increased performance across the board, and snappier menus and loading to boot. Something was clearly terribly wrong with the sim in 1.14.5.0, and it appears to have been remediated quite nicely.
Hat’s off to Asobo… the Devs…& Forum Moderators. We have our sim back. Looking forward to flying this evening for sure.