I can't comment on the Oceania Condos except they really do look lovely. Yes, crossing the street is perhaps a downside but not a "biggie".
However... I did notice that you mentioned your "granddaughter's graduation" trip. How old is she? The reason for the ask is that despite all of the positives that you are hearing about Oceania, if you're a teenager or young adult, they probably would be much happier on Palm Beach. Quieter and less busy is not always so appealing to a young person
So if that is the case, perhaps go back to Palm Beach where there is a bit more action.