I don't think you can compare rates from two different categories. I think the price protection only applies if you originally booked Early Saver (Which our group of 8 rooms did) To date we have gotten $40 back on all 8 rooms a few months ago, and recently got another $100 back on each room just last week. These are now the new early saver rates. I had no problems with the forms, technically I have now completed 16 of them. Within a few days, the refund was credited to each room.
If anyone else is still following this thread, maybe you already know the answer. What has happened in the last few days is Carnival has now added a $50 ship credit to their early saver rate. The rate is still the same as what we are paying for now. I wonder if I can submit forms AGAIN for another $50 room credit for each room? If no one has an answer for this, I will submit 8 more forms over the weekend and try it at least.
Western Caribbean - Elation - April, 2015
Southern Caribbean - Triumph - October, 2015
Exotic Western Caribbean - Dream (B2B) - November, 2013 (Our Honeymoon)
Eastern Caribbean - Dream (B2B) - November, 2013 (Our Wedding)
Mexician Riviera - Spirit - November, 2011
Western Caribbean - Freedom - January, 2011
Southern Caribbean - Miracle - November, 2010
Western Caribbean - Liberty - November, 2008
Eastern Caribbean - Valor - October, 2006