Sounds like my experience wesport.
We booked PE tickets from South Florida to Rome as soon as they went on sale last summer, althogh we connected in Chicago because I wanted to be on a 787. They were $100 more than regular economy. It was a no brainer. I watched prices the entire time leading up to my trip and right after we had purchased them they also more than doubled in price. I think it's more about being an early-booker.
FWIW, I don't really like Miami either but we had to fly there on our leg home last month due to some flight cancellations and I was pleasantly surprised by the experience. It was far better than years past where I dreaded that place.