Lots of kids...........football shirts and fliflops are regarded as formal. I'm sure you will not find it to your liking.
Have you ever been on Ocean Village? or do you just go from other peoples comments? as football shirts and flipflops are NOT regard as formal on this ship.
Don't be put off by the comments from Ballantyne. Whilst the ship is obviously aimed at casual cruising you will find plenty of folks on board who dress "smart/casual" and know how to behave. At this time of year there won't be many school kids on board - the clientele is more likely to be 50+ years old.
If you like to dress up then pay the supplement and get 5 star treatment in the James Martin Bistro. La Luna is also a very nice place to eat with excellent food and attentive service for a very small surcharge.
The Caribbean is fabulous in the winter season so go for it!
Half term is in February, so there may be lots of kids on board. If you go, enjoy it for what it is and don't compare it to Cunard! If you like a more formal approach it may not be for you.