@sangdrax8 You're not the only one. I feel the same way. Using Xbox One controller is fine, but something's off while using m/kb (for Destiny 2 anyway). It's like the feeling of using m/kb on a console, with the weird acceleration/deceleration. I also hope if will get fixed in the future.
Make sure to send Feedback through the app. The more people submitting feedback, the better chance they fix it quickly.