I've noticed more problems like this, and I just bought a new ps4 controller for expac. Works fine on PS4 and other games, but it's really sporadic when it happens so it could be hard to notice. Either way it definitely has felt like something is off with controllers since ShB launch.
It could be kind of like an audiophile thing. Some people can't tell the difference between a $100 or $1000 or $10000 stereo system but other people certainly claim they can.
They absolutely did make changes of some kind, we were never able to jump and spin 360 with a controller like we can now.
EDIT: Recalling the events. My previous controller had already developed dead zones which I knew about, which is why I planned on replacing it for the expac. I played through the first day or 2 of Early Access because when I went to pick up a new controller at Fry's that Friday I couldn't find anyone to unlock the cage, but the controller was getting worse so I went to Best Buy to get a new controller either that Saturday night or Sunday. When I got back with it and plugged it in, immediately I started experiencing that "sticky" movement where my character would keep walking or the camera would keep spinning when using the analog sticks. It was and still is happening randomly. To be honest my initial thought was maybe it was a bad connection (I use it wired, not wireless) so I've since adjusted to make sure I'm always sitting so the cord is straight and not getting bent. Seemed to help a bit, so maybe it is the controller, but it still randomly wigs out. Whether it's a hardware or software issue I can't really say for sure, but the experience was still similar with both controllers (the sticky character & camera movement). But it's difficult to believe it's the controller itself since it seems to be fine on PS4, if anything it's probably the connection. Although it seems odd for the connection to suddenly go kaput at the same time the expac launched, definitely was not happening prior to it.
Either way, it's a little disengenious to say they didn't change anything
when they acknowledged the change to jump spinning in the most recent live letter. Besides, it wouldn't have had to been a direct or intentional change. If they just changed one thing it could've effected others without realizing it, pretty sure that sort of thing happens quite regularly in programming.