Thanks for all the responses. Glad to know I won't be charged if i'm lucky enough to keep the seats. There are no other seats available, except middle seats, so i can't switch even if i wanted to. There are 3 of us, so it's even harder...

I think my best bet is to do web checkin as soon as it's available, and see if it will let me print boarding passes with the E+ seats. They can't kick me out later if I've already printed boarding passes, right?

If my E+ seats are taken when i checkin, then maybe i'll have a better chance of getting other seats they free up with web checkin.