Okay, I read the FAA's written reevaluation (source:
https://www.faa.gov/media/85696).
My notes:
- SpaceX requested to amend its existing "Programmatic Environmental Assesment" of 2022 to support jettisoning the interstage heat shield and (importantly) using an updating sonic boom model based on flight data. In my opinion, this is the critical point of this assessment.
- The impact on endangered wildlife is reassessed based on a report submitted by SpaceX.
- There are other points like concerns about waterway closures, and the water discharged by the deluge system. I know there was some controversy about the deluge system and the cleanliness of that water, but according to this report, it's all good.
The new evaluation of the sonic boom using flight data shows that SpaceX's original assessment was way off and the intensity and area affected by these sonic booms is much larger in reality. The FAA then goes through a significant amount of rationalizations (with sources, to be fair) to justify that the predictions of the new sonic boom model are still acceptable.
The biological resources section also shows that SpaceX underestimated the effects of their launch operations on local wildlife, but some research and monitoring measures are proposed to counteract this.
All in all, my opinion is that the FAA is doing everything it can to not be an obstacle. But they do have to analyze this stuff much more rigorously than SpaceX does. That is quite literally their job after all.