The aiming in Destiny 2 feels a bit off. At first it moves slow and then it goes fast. Changing the sensitivity has not fixed it and using a different controller also made no difference.
I think this is intentional. Whether they will keep it around much longer is a different story, but I don’t think this is a bug or anything. It reminds me a bit of the way it was in Killzone. It sort if makes your character feel heavy. You are wearing a big suit of metal armor, moving around isn’t going to me instant. This is my guess at least, either way, I don’t think that this is a bug.