The dawn is a great ship. I enjoy the smaller ships for faster disembarking in ports and not feeling like your in a cattle drive. Elevators are easier to catch, etc. All the things that are problems on a big ship, due to the crowds. What you don't have are the Go-carts, laser tag, water slides that the Bliss has. If you have a port intensive cruise then you might not miss it as much. It comes down to what does your family want with your kids being 16, 15, and 10? It will take a little adjusting, but there are still tons of activities on a smaller ship like the dawn, just not as many as the larger ships.
I also like you don't have to have reservations for all the shows. Gameshows are easier to watch because they are done in a lounge not the atrium. I think it easier to get dining reservations at specialties as well. They have production shows, but they aren't going to be fresh off Broadway like the mega ships. Hope that helps!