Do you not realize that you just answered your own question?
You are now getting more service for less money. And you wonder why they won't upgrade you early?
im not asking for a upgrade on all lines, just the bread winner, primary line. in years previous, they allowed me to upgrade but not my wife, because my line was the primary and the one incurring most of the charges. im sure my primary line costs more per month than most others who may be eligible for an upgrade, that is if others ip4 release day owners are eligible.