The way I read it (I was going to post a boiled down version, but the board has a post length limit[!!!]), the Forest Service can only charge the fee at sites with certain minimum number of amenities. They specifically cannot charge someone who wishes to park, drive through, hike, walk or picnic (the uses that typically apply around here) in the forest unless it is within a specifically defined area (think a small area, delineated with visible markings/signs...not the entire forest) that has the minimum number of amenities. I don't think the intent of the lawsuit was to get them to disallow charging fees for parking/camping at developed campsites.
I've purchased adventure passes nearly every year, and I can't imagine what places like Azusa Canyon will look like without funds from other sources.
EDIT: maybe I see what you might have been trying to say about things not changing. The old Adventure Pass policy, as I learned here, allowed you to park within the forest without an adventure pass and not be cited, except in a few areas listed on a map cited somewhere here on the board. Given that, I could see how some might think that this new ruling would mean no change. However, as I understand it, the old policy was to cite if you if were out "recreating" and didn't have a pass, whereas the new Adventure Pass policy (again, as I read it here) called for you to be cited even if you weren't out "recreating" and didn't have a pass. This new court ruling seems to prohibit the Adventure Pass thing entirely...essentially saying you can't place a fee on the ENTIRE forest.