The combo system hasn’t changed at all, even with CAM on. It is 100% identical.
If doing QCF motions within the combo system is fun for you (which is fine, it’s fun for me too!), then just turn CAM off and have fun. But if someone doesn’t want to input special cancel motions, that’s no skin off my back. I don’t care whether they have that skill, and them having that skill isn’t going to make the difference if they beat me or not.
I want to stress that CAM only works in combos. Doing the motions in neutral is still required, which is a very important distinction for fighting game balance. And now, with the S3 changes to how CAM enders work, in order to get your most useful enders you will have to do the motions too, even with CAM on.