Thanks a lot for reply,You can flash the official rom on the 4gb variant and you can also flash this de debloated and deodexed version also. The issue you will have is that you will have only 1.2gb of storage. On official LL rom it wont even update the pre-instaled apps. With this one it will be able to update all of them but you will not have room for anything else! 1 or 2 big apps and its full...
But I have a question. Can't I move apps to sd/external storage?