We've always requested non-smoking, pool view and have always gotten great rooms. Our last visit we had room 5519, top floor. That is a corner room also with a different layout than what you see in the diagrams they give you. Being a corner room it had lots of windows and just seemed bigger to us than our previous rooms (this one is a 2-br lockoff by the way, we only used the 1-br portion, someone else was in the studio). Also we like the top floor as it has the cathedral ceiling in the bedroom too.
All that being said, we have never been disappointed. We always kind of expect the worst, resigning ourselves at being fine with whatever they assign us, but then being pleasantly surprised with what we get!!
Have a wonderful trip!!!
I almost forgot, you asked about the electric light parade. You can see some of it from the pool view rooms, but you're better off going down to the beach to get the full view. In 5519, our balcony off the living room was fine to sit and watch it, but the bedroom balcony had the high walls you were talking about. You can't see a thing if you're sitting down.