I got a few packs through the car last week and am just now digesting my notes.
My overall impression of the chassis is that it made the car feel more direct. It was more nimble through the chicanes and more predictable in the highspeed sections. I found myself more comfortable running a tighter line. I wouldn't say I picked up any steering or rear bit, but just overall I felt more connected to the car. One of the most tangible benefits I noticed was more even front tire wear; I suspect from keeping the front end flatter and allowing the tires to share the load rather than flexing and loading the outside tire.
If anyone else has any experiences with the on-point chassis I'd love to hear their feedback. I'm impressed with the differences I felt in just a chassis change.