I am guessing that once the Verizon introductory offer disappears, those that sat on the sidelines looking for more pennies to pick up, while start complaining that Verizon didn't keep it going long enough etc.
By law, Verizon cannot make any substantive changes to the current offering without approval (active or passive) from the subscriber. However, they can, and probably will change the terms and pricing such that, the new offering will not be quite as good as what is being offered now.
Crunch the numbers, talk with Verizon customers in your normal area to check real time coverage etc. Verizon offers a 14 day return policy. If the numbers, possible better coverage don't work in your favor, then you stay where you are, or try another carrier. At least be honest about it all, instead of complaining to complain.