This is sorta the problem with DCL. While other cruise lines are offering all these activities like on Oasis, DCL does not have many activities for families with older children. The only thing I can think of kids ages 12-18 doing on DCL is pool and aquaduck, club things and shows which puts DCL at a real disadvantage because if I am at sea for 3 days activities on other cruise lines vastly outnumber activities on DCL if you are a family with older children.
I think this just proves the point that I made earlier in the thread. It really all comes down to what appeals to you in a vacation. If you want a city that never sleeps, there's a place to get that. If you want top-of-the-line service and don't need to climb a rock wall or surf, then there's a place to get that, too.
Bingo. This is actually the great part of competition in the cruising industry. There are so many options you can choose from. Each cruise line has there own specialty which suits any kind of vacation people want. For example if you want many activities you can pick RCL, if you want an old style cruise you can pick HAL, if you want a custom experience you have NCL, if you want a great disney top of the line cruise you have DCL, if you want to go on a budget you have CCL.