Here we go and mine is based on doing 12 cruises in 9 years so I probable differ from some here
1. Change up the entertainment - especially the acts the have done the same show for 4-5 years going (John Charles is one exception, all his shows have been unique

)
2. Change up the stage shows or offer alternatives - unlike some on the boards I can really only stand the shows once maybe twice max. I do realize that this is the most difficult to do which is why I offer the alternative idea.
3. Change up the trivia questions, for goodness sake how hard is it to change up the music trivia, I think it is the same on the 4 ships
4. Menus need to be turned over often, even taking the chance of losing some favorites, what initially was exciting has now become that again!
5. Late night activities other than the dancing and piano options they have now, crowds disappear after the adult shows are over. (I will say though keep the piano music, when the right artist, Rob Sanders, is playing it is a very enjoyable way to end the night)
6. More adult activities during the day, I vaguely remember some pool events when we cruised early on. With the rate our kids abandon us during the day for the clubs some more fun activities for us would be great.
7. Alcohol policy back to what it was - While not a deal breaker it was part of a way to justify the cost and it also happened when
DCL was making many other small changes.
Here are my biggies and why in 2017 we are cruising another line. We will however use our placeholder in 2018 and be back on DCL.
8. New itineraries - In the time we have been cruising DCL there has been very little change here even when they went from 2 to 4 ships
9. Pricing - We can afford it, but as fairly frequent cruisers the value is not there and ultimately DCL may end up not being the long term line we thought it would be for us. It needs to come down, eventually the bubble will burst though
10. Frequent cruiser perks - These really are far behind other lines, but I do understand that DCL banks on newer cruisers. In the long run for them though keeping those that want to cruise DCL a lot very happy might be in their best interests. Bringing back the extra onboard credit for platinum would be great
I am sure there are more but these quickly cam to mind