Today I received the Marshmallow update on my J7 and started researching for new ways whether it's possible to move Logos resources to extSD. This is what I found:
http://www.modaco.com/news/android/heres-how-to-configure-adoptable-storage-on-your-s7-s7-edge-r1632/
If I'm not mistaken, this method should work for all Android 6 devices, not only S7. It does not involve "rooting", and can therefore be, in case of failure, completely reversed.
I'll give an update after testing it out in the evening. The description looks very promising so far!