Scawen, one little thing that I'm not sure of if it's a bug or left that way intentional:
When in Options > View, the "Look function" is set to "ms X" or "ms XY", the settings for look sensitivity and look centre reduction still seem to be based on the 360° look that was available prior to X30. What I mean is that a look sensitivity of 1.00 should result in full (90° left/right) look if the mouse pointer is completely at the left or right side of the screen. However, currently it will already reach full 90° look when the mouse pointer is halfway between screen centre and -edge.
Now, one might think that setting look sensitivity to 0.50 might solve the problem, and it does, but only if you're not using the look centre reduction setting. If that IS used then the non-linearity of the look (which is still based on being able to look 180° back) will result in having to adjust the look sensitivity again to get the desired "mouse pointer at edge = full look" behaviour.