as you quoted:

> I don't want to wipe all of my data(very important to me!)

So, A way to do this would be backup editing. You will need the following:

 - A PC
 - Your phone, rooted, with cable
 - adb installed (intall from [here](http://developer.android.com/sdk/installing/index.html?pkg=studio))
 - a copy of the stock ROM from online(you made need a MD5 dismantle method, look at this link [here](http://forum.xda-developers.com/showthread.php?t=2138885)

Assuming you are not rooted, do this first:
download kingo root from [here](http://d.kingoapp.com/website/KingoRoot.apk) and install it on your phablet. Then, press root and wait. Once it's done, continue on below.

If you do not want to root (even though half this process will unroot it) look at the answer [here](https://android.stackexchange.com/questions/28296/full-backup-of-non-rooted-devices)

First, turn on your phone. head to developer options, and enable USB debugging. Then,
 plug you phone, and use the command 'adb root' to ensure no problems, or very few anyway. `adb pull / backup.zip (leave a space between the source i.e. the /, and the place you will save it)` Be sure to to put what you want to save it as.(I suggest backup.zip)
next, with the stock ROM, take it apart (see link i gave you on how) and "loot" the /system file.
Then, open the backup you made, and replace the backups /system with the stock /system. re-zip the modified backup, and boot your device into recovery.
from recovery(must be custom, 2.3 does not have what we need by default) choose an option along the lines of `install update via sideload`,then run this command on your PC: `adb sideload <filename of update.zip>` or, in this case:

    adb sideload backup.zip
And wait. By the time it reboots, it should be in fine condition, without the loss of your data. Good luck :)