I too experience the very floaty FFB through my G27 with R3E. Everything feels right except the very vague sensation when turning a corner, which for me is the most important thing about the FFB.
The moment your turn the wheel you want to feel the rubber resisting laterally against the road so you know exactly where your car is and how much more or less steering to apply. But in R3E it's incredibly vague, so I turn more because I'm not sure if I'm gripping or understeering, and I end up oversteering, countersteering and then spinning or fishtailing to regain control, or just understeering off.
I guess I really need to spend a day just going through all the available options and finding something that works, because i really want to love this game and give it my support and monies. Especially now the dedicated servers are here.
It's a shame because in the earlier, Sector 3-made updates back in autumn last year, it felt absolutely perfect to drive.