"to what extent people are willing to embrace a technology that limits their freedom" is very different than the questions posed in the survey which explicitly ask how would use use the technology if it allowed such freedoms... We already know it will not and should not have such freedoms.
Example:
Pointless. It doesn't matter what you'd like because it's going to be limited by what the manufacturer deems fit and regulators deem fit. It may allow modest yet still safe options but nothing like a human really drives and for good reason. If a 4000 lb vehicle is tailgating, computer controlled or not, I promise it's stopping distance will be greater than a light weight vehicle in an emergency situation and will therefore end up slamming into the front vehicle.
Here's what you should be asking:
Would you be willing to give up ALL control to an autonomous vehicle and ride as a passenger to your destination?
If they answer no then you've pretty much eliminated SAE 4 and 5.
That said, the manufacturer can choose to add some different driving styles, but your "freedoms" are still limited by available choices. Perhaps you can call it "perceived freedom"
Before coming up with a research paper on the topic you'd also need to do some research into the background of your topic:
http://ais.informatik.uni-freiburg.de/publications/papers/kuderer15icra.pdf
Autonomous Cars Could Determine Your Driving Style by Gently Probing You
https://pdfs.semanticscholar.org/bb4c/3821b197b11fc4f818a7538e8bff5484612a.pdf
https://mediatum.ub.tum.de/doc/1294967/1294967.pdf
http://www.auto-ui.org/15/p/workshops/4/Comfort Determination in Autonomous Driving Style.pdf
This is a widely researched topic. Look specifically at the last link, it's a proposal... was this experiment ever performed?