If you do rebuild, I suggest rebuilding off site as we don't know when this will happen again
It's recommended to not edit your lists too heavily yet as we don't know how far along the devs are with restoration, and your lists may be scrambled due to the restoration attempts
We don't know what the situation is after it was confirmed the drive containing user lists crashed and lost data
Do you need any more information on the current situation?

So how are we doing with the reading lists? Have you already started rebuilding or are you still waiting?