We are sailing this Aug with DD16, DS13, and DD's 2 best friends who will both be almost 16. Our plan is to send DS13 to Edge ... he makes friends really easily so hoping that our kids having totally separate spaces on the cruise is a good thing.
If he absolutely HATED Edge, I would consider asking about bumping him up, but having no expectations of it being allowed. On our last cruise, DD went to Edge and found nothing appealing to her ... luckily DS likely won't find that to be the case. It was a short 4 night cruise so luckily she didn't care at that time about not going at all.
My biggest concern is with looking at some of the old Navigators that have been posted ... it looks like the first "welcome to the programming" for both clubs starts around 9PM that first night ... we have 2nd seating for dinner ... so how bad is it that they are likely going to miss those first "connections" in Edge and Vibe?

This is an extended family cruise, so I really don't want them missing their first night in the dining room ... pretty sure they will skip the odd night later in the cruise, but I want them with all of us that first dinner.