Two big features were added in this beta - well "big" in terms of the effort and complexity involved with them. Personally, they are features I will probably never use but they are long standing omissions from the app. This means that I'll need y'all's extra help in banging on them since I won't be testing them in the normal course of my usage (of course, I have done basic tests during development).
1) Edit subtitles - you can now delete and/or search for and download external subs from within the app. Available from context menu (long-press or "menu" button) and on "..." menu on detail screen.
2) More filtering - this is only in the movie and TV grids right now and doesn't contain everything it eventually will but I needed to stop somewhere and get a beta out.
Thanks for testing.