I would definitely not recommend going back to pCars 1.  It was a great 'sim-cade' game that got me into sim racing and help me learn the tracks, a little about car set up, a lot about league racing and racing etiquette, etc.  However, as others have said even bad car mods in rF2 are significantly better than the best car mods in pCars 1, the feel and physics now leave me cold.  I don't have any confidence that they will get to rF2 levels of FFB, however, I have to believe that they will improve significantly, and if they do, with all the other features this game will offer, I for sure will give it ago and maybe get back into some league racing with it.