As much as I love BG3 (and I do very much love this game), one thing I find a little cumbersome is movement and camera control.
Having left mouse bound to move and middle mouse (mouse-wheel for most) bound to camera rotate per the defaults is just rough.
I'm sure it works fine for the maniacs who keep their middle finger on the mouse-wheel and right-click with their ring-finger, but for us sane folks this setup is just bad.
My index finger is doing double duty trying to move and rotate the camera. This is especially awful if you hold the left-mouse down to run.
I modified my keybind for camera rotate to my mouse's thumb-button ("MOUSE X1" according to my computer). It makes moving and camera control SO MUCH BETTER.
Highly recommend.