(Running on Windows 8.1 and Logos 5.2a B3)
1) It looks as though the previously reported performance issues in adding tags have been resolved - thanks for that
2) There is still an issue with ratings not showing in the library window after they have been updated.
In the screenshot below look at the entry for "Revealing Jesus". I have just added two stars in the editor but it doesn't show in the main window

Closing the Library window and reopening it causes the information to be displayed correctly.
(I believe I flagged this earlier and haven't seen anything in the release notes to indicate it is fixed so this may be a superfluous report but wanted to flag it was still an issue)
3) When I am tagging a book I normally apply the tags I want and then assign a rating.
However, when I do that now - and click the rating immediately after setting the tags - the rating doesn't "take". I need to click it again for it to be accepted.
If I just click the rating without assigning tags it seems to work first time.
Graham