We were on Allure when my younger one was too small for zipline, flowrider...but she stil had a blast. Loved the pools (including donut one with a life jacket), rock wall, boardwalk, activities, shows and overall ship. We're going on Symphony and she's super excited now that she can go on the things (plus waterslides, laser tag).
Guess we don't know yet what Oasis change will bring. Maybe they'll modify the splash area to toddlers (and even as it is, its cute).
On a different note...anyone ever do two bookings for same date? Temped to just book Oasis too, but guess it's not really fair to hold a booking we know we will cancel one of them.