Totally random but I just downgraded my Moto G from 4.4.2 to 4.3
This wiped my phone of course requiring me to reactivate... which still works. Theory is as follows:
This is based on Verizon's servers
There is something about the firmware... but unlikely.
If anyone has a Moto G and wants to "experiment" and risk bricking
for the sake of trying to activate try this:
First, downgrade from 4.4.2 to 4.3:
Then follow the usual process and try to activate. Do note that thjs process will wipe your device so backup your stuff!
I downgraded because I'm searching for a way to root my Verizon Moto G hence this finding... like I said though, no guarentees.