Yes, we removed Playlists so that we could add an option for Audiobooks. Fast fix is unlikely since we don't currently have any other major bugs that would justify a 3.1.5 update, so reverting to 3.1.3 in the way you describe would probably be the best workaround for now. (sorry about that - didn't realize anybody was using Playlists in this way, in fact just in general the Lyrics Reader is one of our least popular features)
Hi, I just wanted to mention that I found/realized there is a very easy workaround for my issue (even though I seem to be the only one in the world who noticed it). Since a few versions back, I believe, the lyrics reader picks up on whatever is being played by the built-in Music app (as opposed to needing to choose a track specifically through the Pleco lyrics reader, as it was maybe back in version 2). So what I've found is that I just launch whatever Chinesepod lesson I'm listening to through another app, then switch over to Pleco. Not a big deal.
Re the issue of changing a lot of the settings (which is why I didn't want to roll back to 3.1.3 to solve the lyrics-reader/playlist button issue -- so as not to spend time fiddling with settings), what I find in particular is that I spend a lot of time figuring out how to make all the fonts bigger. At age 51, I need bigger fonts than the defaults for readability. As it works now, to see the results of any particular fonts change, you have to drill down into the settings, then go back over to the dictionary, then back and forth until you have the settings where you want them. I have to remember where those settings are (for instance, under "Languages + Text" not under "Search Interface" or "Definition Screen" or other possibilities which also seem logical).
As well, under "Languages + Text" I have to figure out that "Entry body" and "List definition" refer to the same thing, though they use different words (ie, "body" and "definition" both basically mean "the definition part").
Putting those elements together, I find that when it comes to Pleco, I get a little nervous when an update or changing phones or what have you might cause me to have to get it all working as I like from scratch. For all those font size changes, for instance, the gold standard is definitely WYSIWYG -- if there were a little popup that showed what the screen will look like with the changes, that would be great.
Will be switching to iPhone 6 this weekend and we'll see what happens!
Thanks as always for all the great work.