I definitely agree about the USAF’s 75th being the main event. You would never know it from what was displayed, flown and otherwise shown. From my perspective, no difference from previous years.
Regarding warbirds being notable for their absence on Friday and Saturday. Departure of aircraft if all types, including warbirds, is typical starting on Thursday, with Sunday being VERY sparse. There was an additional factor in that the Dayton AirShow was this past weekend. I volunteer at the Warbirds tower, and most of the warbirds departing on Friday announced that they were on the way to Dayton.