What changes were made to vehicle turrets in V2?

in Game Support
In V2, my old sensitivity no longer feels the same; turrets are no longer capable of exact movements and fine tracking is near impossible. Also, there are stabilizer bugs such as reticle jitter on slopes and reticle lock when looking at 12 o clock from the vehicle and trying to move the mouse slowly. What was changed in V2? I can't find anything in the patch notes relating to vehicle sensitivity, and I really want to recapture my aiming from pre V2, as my old sens no longer works the same.
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From the V2 Patchlog:
Network Optimization for Vehicles with Closed Turrets
And from the Playtest Phase:
V2.0 UAT Update #5 Known Bugs and Issues
So in the UAT They talk about a "new Vehicle Turret System"