I've been getting by using an app called Folder Mount which basically does a sym link to the SD Card. It allows me to move Android/Data and Android/OBB folders to SD and has been well worth the $2.99 price of admission to redirect 21gb of app data. Note: I am not affiliated in any way with the...
Once rooted, I used Folder Mount to setup SD Card redirection which accomplishes effectively the same thing, except I redirect OBB and Data files which saves more memory than just App2SD.
Portability was key for me, so 8.4 for me, but a 32gb option would have definitely been preferred. Even with a 32GB micro SD, still not enough local storage due to Kit Kat limitations.
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