I finally upgraded from a G27 to a CSL DD. Wow what an upgrade. If you’re on the fence - do it. You feel so much more of what’s happening on the road. Instantly became more consistent and a tiny bit faster.
I’m assuming you know about https://github.com/gotzl/hid-fanatecff ? That’s the one that’s mentioned by the oversteer dev https://github.com/berarma/oversteer. I don’t personally have experience with it as I use a t300rs currently, but I’ve been keeping an eye open for a used Fanatec wheelbase that’s on that list since it would be nice to try to contribute to the project if I can.
My experience digging into the tmff2 driver is that very few games actually support all the effects that the wheel does so the “feel” tends to be pretty much the same even if not every effect is supported. That said the issues I’ve faced are nearly all proton related and more often with my pedals like here than anything else.