Your choice. Corrupt system data is going to cause all kinds of problems.
You can do a batch restore of your user apps and their data (Setup the launcher you like and after youve back it up with TiBu you'll be able to restore it to the new Rom keeping all your icons and settings the same) but that's about it
Nexus 7 Running [4.1.1][AOSP] Codeman Android 3.1.0 [JB] on top of Trinity Seven Alpha63d
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OG ---------> DX ----------> Bionic
So far so good on .229 I mean on .230 fml Really??? FML again... I'm on .232 Now