In regards to Verizon's upgrade list here; even though it isn't complete, I think it is ridiculous that carriers aren't more worried about getting their phones upgraded. I recognize that the manufacturers do the development, but you'd think that the carriers would try to light a fire under their ass.
Verizon works with the OEMs on the phone(s) they want to update. The decision to update the devices rests solely on VZW and not the OEMs.