Actually from what I read in the XDA Developers forum, it is a problem with the OS (or at least Google programmer gods ideas of what the OS needs) and no, it is not going to be fixed. I bought a new Galaxy Tab Pro 10.1, only had 16 gig internal but hey, they advertise it's expandable up to an additional 64 gig w/ MicroSD card, right? So I bought a 32 Gig card and put it in there.
Wanted to set up Dropbox to synchronize documents between my desktop and the tablet (and vice versa), OOPS! Can't do that. If Dropbox writes the files to the SD card, your Office software can't update it, nor can you create new files in a Dropbox synchronization folder if it's on the SD card.
Wanted to copy 3 Gig of photos from my computer onto the card and an app on the tablet to clean them up and delete the ones I don't need. Sorry! Can't do that! Have to copy that 3 gig directly onto the primary storage!
Wife would like to get all of her music library converted and made available. Same problem. Can't share data on the SD card.
So yeah, for what I want to do, KitKat has basically made the MicroSD expansion card unusable. And yes, I understand that if I were to root the device, I could add the two lines to some configuration file and it would all work properly again, but why should I have to do that to get functionality that Samsung advertised to be available.
And don't even get me started on the wonderful new feature where if you uninstall an application, it magically deletes all your data (documents, music files, whatever).