So good to read that I'm not the only one struggling with ACC on PS4 with a G29. Personally I prefer the steering really light, so have the FFB quite low, gain is 14. I can't find the sweet spot on ACC like I can on Project Cars 2. I find that much more imersive and enjoyable. I've given up on ACC many a time, going in a straight line I have no issues, when it comes to braking and cornering though, I never know what's going to happen. I just can't get consistency like I can on PC2. There I can go lap after lap with no incident, on ACC I'm on a roll if I get three clean laps. The car, Ferrari 488, never feels planted, it's twitchy and if the FFB gain is higher it feels like it wants to drag me off the track. The centre of gravity feels odd too and the weight balance is not to my liking. I have no confidence in my control of the car and don't feel as though I can really push.
I really want to get on with the game, you hear so many people hyping it up as the best racing game on a console. I don't feel that though. It seems to me as though the only way to really enjoy ACC is to get it on PC with a DD wheel and load cell brakes. I'm not that in to it to spend loads of money on it though, so will just have to adapt with what I have.