I had to RMA my GPU so I tried GT Sport for the first time with an FFB steering wheel yesterday. It feels quite good to be honest, but that understeer rattle is annoying coming from PC sims. Not that it rattles, but that it's like an on/off switch, comes suddenly and stops suddenly, and it's very intense. Not natural at all. Not sure if I missed any settings, I have steering sensitivity on 1 (gave the most 1:1 steering), FFB torque on 3 and sensitivity also on 3 IIRC.
Edit: On a T300 + Ferrari F1