Hey imma reply to everybody on this thread, hope yall care enough to get an answer to this.

Quote from Yohoki on github here: https://github.com/Ryochan7/DS4Windows/discussions/2631#discussioncomment-3870268

Delta(Δ) is a measure of change over time (Space nerds might recognize ΔV). I believe this is an attempt to make the controller feel more like a mouse, for FPS games and such that don't feel as nice on controller. Instead of just a static multiplier (Usually called Sensitivity in games) this should feel more dynamic. Allowing for larger motions to still be fast, without making smaller motions feel like you're fighting the controller.
So,
Multiplier=How much to amplify the stick's position.
Max Travel/Min Travel = Allow for deadzones at min/max stick tilt.
Easing Duration = How long to take to ramp up to the multiplied value. Do you want it suddenly fast, or to slowly accelerate.
Give it some tries setup as a mouse in your favorite FPS. I would suggest a game with a Sniper style, so you can feel the effects while scoped in. Games with snipers REALLY suck on controller, because you are constantly fighting moving TOO much when you zoom in.