I have no problem sitting out on the public decks and often do so even when we have our own balcony. The only real hassle is when so much of the outside promenade deck is reserved for the lanai staterooms on some of the older ships.
Thanks for the advice. However, when I checked with our TA, it would be nearly $1,000 more per person because of what we would lose and the extra we would need to pay. (We had a great deal when we booked.) So, we'll keep what we have and be glad to be sailing. And, we can always hope for an upsell--an upgrade is probably too much to hope for.