I hadn't updated my wheel in months, and they released firmware for the base (and the wheel) today.
While downloading and installing the app on my computer, I tried Full Force, and it felt strange, but after updating to DD+, I definitely notice when the car is at the rev limiter and when shifting gears. There's also a slight vibration throughout the track, and you feel it more when going over the kerbs than before.
So, it's a pretty good change in my opinion. (I don't know if changing any settings in the Fanatec app makes any difference in a PS5 game because Full Force in the app has three options: Road Effects, Pure Force, and RPM. I don't know if disabling or enabling one affects the PS5 configuration.)
It's linked to the controller's vibration, so you have to have it enabled on the controller. And well, I had to reduce the base's force a bit from what I had configured before, but that could also be due to the Fanatec firmware. š