Yes. Although BeaTunes analyses the music files as expected, I have found that apps and booklets are now turning up, with offers to fix cover art and other tags in the 'Inspect' function. iTunes 22.214.171.124, BeaTunes 4.0.24. Also I have noticed that iTunes has been adding cover art to files that I know didn't have any, sometimes inaccurately (not a BeaTunes issue).
Oh dear! Too late now. No idea why iTunes has to mess with tags. As long as all of my music is actually there I should be fine. I still haven't got the iCloud library working, I might give it a rest for a version or two. The three-month free trial is the main reason that they haven't got massive backlash. iTunes Match has been known to be broken for a long time, yet they clearly based Apple Music on it. Marketing must be too influential within the company. I don't get the whole streaming thing anyway, I like my files. :-)