I only downloaded it earlier today, so I have not had much chance to see it properly.
Good points I've noticed:
-It is definitely faster, especially the startup - although still not as fast at starting my Mi-1S
-It again backs up system data and settings - great;
-The screens appear clearer;
-The difference between the toggles and settings icons, when the toggle is switched on, is good, although when the toggles are not on, the difference is still not great enough.
However ...
-All of my third-party widgets are still crashing during the backup - a real pain to put them all back every week;
-The system fonts need to have an even smaller setting - all of my apps now have a larger font which means, for instance, fewer words per line, and fewer lines on the screen;
-The theme cannot be customised without fiddling around and deleting data;
-The book format in the browser still cuts words in half and adds blank lines;
-It would be good to go back to being able to edit the bookmarks in the browser.
Whilst it is nice to have the fancy portrait/landscape graphics in the camera modes, it would be good if some of the basic functions were concentrated upon and improved.