Ok, I normally ride FJ at least twice a week, but I hadn't been on it for about 2 weeks before I rode yesterday.
1) The motion profile felt exactly the same to me as it has for several months, after the latest round of adjustments earlier in the year. The reprogramming mostly affected the dome scenes, reducing lateral motion. I've noticed no increase in reclining.
2) There was no "air bladder" (really the wrong word) apparent on my bench, and I've heard nothing about them being installed after the test with a couple used at alternate load. There has always been air blowing at your feet in the dome scenes (wear shorts & sandals to really feel it) but I felt nothing new on my face.
3) The one new thing I did notice was the amazingly bright, sharp, and well-saturated image in the 3rd dome. I've watched the dome projections change a dozen times since 2010, and I've never seen an improvement this noticeable before. It almost looked like they enlarged the image or moved you closer to the dome somehow (which I doubt) because the screen feels so much more immersive and detailed. I specifically saw definition in Harry's Patronus stag that I've never noticed before, and texture in the stone of Hogwarts castle.
I wasn't able to take a second ride, and the TMs I talked to said they knew the projectors had been worked on in the previous weeks but didn't know details. I've always felt the muddy, low-contrast projections in FJ were always the biggest flaws holding this attraction back from perfection. If this upgrade can be applied to all the domes, then the best ride ever is going to get even better!
Disclaimer: I had a Guinness and a chicken waffle sandwich shortly before riding, so my powers of observation are not guaranteed ;-)