Just bought the Romantic FP to Europe, but I won't be romantic as I will use all 4 credits myself. I bought the Florida one also, and while the regular FP might be cheaper per credit, I did not want 8 credits, just 4. It was cheaper than most of the flex fares on the AC site, and it allowed me to book flights that were considerably more expensive.
The FP T&C says eups can be used as normal, but when I look at flight availability for a flight 6 days from now (well within the SE window) it shows eup availability in the listing, but when you select the flights I get the following:
I had the same issue with the Florida pass, but since the flights are 4 weeks from now I assumed it was just because I was outside the eup window.