People are just upset because they think VZW taking something away. In reality, MOST people will likely have lower bills in a tiered data plan, but they don't realize this. They are paying more to have what they think is an unlimited plan, but are paying for much more data then they realy use. With the tiered plan, they will only pay for the data they use = lower bill.
EDIT: With this said, I do like the feeling that I have "unlimited" data, knowing that my bill will be the same amount each month. I don't use lots, so I would probably have a lower bill with tiered, but I can understand and appreciate the "comfort zone" feeling of the current plan.