IMO it's being saved for either this trial or hopefully, eventually, the murder/conspiracy trial. IMO RW wants to save CD and LVs reactions to this info for a jury. Also, I think by sharing ACs, he is testing out what the defense will do with this type of info. ACs phone info is a safe bet because IMO even if it gets thrown out somehow, he will know better how to play his hand with the other co-defendants cell phone data and yes, I do 100% believe he has the data from all the 60+ phones and is going to drop that info and make a crater sized hole in both their defense plans.
Jmo.