When Verizon stops paying for half to two thirds of your phone, I'm sure you'll be able to dictate what is grandfathered and what is not. Actually, that's the case now, since you don't have to drop the unlimited feature when you buy the phone all on your own and without the carrier's subsidy.

As vzwinagent said, you don't have to switch to the new plan, you only have to switch off of the unlimited date feature. Aside from the penny more they charge, its the same price. I get that its the principal of it all, but again, since they are paying for the bulk of your phone, they get to dictate the terms.