So I stumbled upon a solution to this... while updating some IOS apps I saw an update for Google Play Music... and then I remembered that a few releases back of OS X I had a tool in System Preferences that would sync my playlists with Google Music. So I checked online and sure enough, my playlists were there and most importantly... in the order I want them in. I listen to a lot of sermons when driving. Oftentimes to get a balanced interpretation of things, I'll listen to more than one person speak on the same portion of scripture. So maybe I'll listen to Jon Courson teach on Gen 1:1 and then listen to Chuck Smith teach on the same thing. Then back to Courson for Gen 1:2, etc. Some pastors do topical studies as well, so I might listen to a "through the Bible" message from Courson of Genesis 1:1, then 1:2, then 1:3, but then listen to a "topical" teaching on "Creation" also from Courson. My point is simply that I have my own order I like to listen to them in. This has worked fine for years, but recent changes with iTunes, IOS, etc have obviously broken this.
BTW: why is that I still manage Audiobooks in iTunes on my Mac, but they're iBooks in IOS? Wouldn't it make sense to have them *also* be in iBooks in OSX and for say iTunes to sync with Music between the OS's but for book/audiobooks to both be managed and sync'd between iBooks in both? I think this is part of the core issue... my "sermons" playlist is in iTunes on my Mac, not in iBooks. But on my phone, there's an Audiobooks section in iBooks now. The problem, as others have pointed out, is the audiobooks section of iBooks on my phone show all the sermons, but not in my playlist order. I'm sure this has to do with CarPlay and Apple Music and wanting to put everything into the cloud. But the fact that I can't cable-sync some items and cloud sync others is a pain. At minimum, Apple needs to show the "Playlist" under the Audiobooks in iBooks on IOS, not just the title, author, genre, etc.
Regardless, today I re-installed the Google Music Manager and let it re-sync (took a bit as a lot had to upload and update). Once done, I fired up the Google Play Music app and low and behold it was all there. It shows my "Sermons" playlist (which is just MP3's) as a music playlist and works just as it should. The only gotcha is I lost the ability to play them at 2x speed, but at least its there. Once I went to IOS 9, they weren't there at all, much less at 1x speed (and yes, I tried setting all as "music" in iTunes... they still didn't come over). The next plan is to see if I can do the same thing with Amazon since I'm also a Prime user.
I hope this benefits some of you. I saw the guy on this thread that posted about his own app. I appreciate it, but I saw the same thing his screenshots in his App Store listing showed: namely no playlists. Google, for now, seems to still let me have audiobooks listed as a music playlist and control the order "my way". I do like Apple and am in their eco system on multiple levels, but the "their way or else" mindset is getting a bit old. Maybe I'll get lucky and get a Google or Amazon music player on my Gen4 ATV soon...