Well, I had the stock .314, rooted and, of course, BL unlocked.
So I installed DoomLord's kernel. Rebooted into recovery and flashed the provided file from the recovery.
Wiped Cache and Dalvik.
Rebooted... and BLACK SCREEN.
Why would I want to put apps on the SD Card ?
Well, the internal storage is given for 16GB but, it really is only 11.2Gb.
Install 2 GPS apps and you'll only have 9Gb left.
Install 1 or 2 really "heavy" games, and you'll have only 6Gb left.
Install some smaller games/apps and you'll have only 1 or 2 Gb left...
And, I think we can agree that SD Card is not the most reliable media you can have.
And if that crashes, if it has apps on it, I can always recover those apps.
If it has photos or videos from my family, I can't...
So I'd rather store my media on the internal storage and install games on the SD Card...
Just to tell it : I can do that easily on my LG GPad 8.3 Tablet.
And there is no way to do it on the XPeria Z2 Tablet ?
Just because of this, my tablet is now in an ad on a widely spread site here in France...
Will not keep a tablet no one is devellopping for, with no chance to get problems solved (don't wait for Sony, they obviously don't even know how to develop their own devices because they are still living on their totally closed sources model !) and with so much limitations (SDCard, bootloader, recovery...). Just to say it : Sony released 2 or 3 FW updates since the .314 which seems to be the last to be updated.
But of course, you can be happy with it... I also was, until this thing with the SD card came up. because I ran short of storage.
And so I digged a little deeper to find out about all the limitations on a poorly supported device.
This feature for the SD Card exists on my XPeria Z2 Phone and it works like a charm on the phone...
So why not on the Z2 Tablet ? That is a mystery to me...