While I enjoy Edge, Solstice is my preferred size/class of ship. I hope Celebrity doesn't follow the trend if going bigger.
But, I do think there's a market fir a floating island at sea experience and I don't think people who may like that are steeple. There are/coyld be valid reasons for vacationing this way. Sure, it's not the cultural experience you get visiting various countries, but if it's safe, cost effective, and enjoyable... those who elect the experience shouldn't be frowned on for doing so.
I just hope some new ships, by Celebrity in particular, are scaled down a little and they focus on refining the products and services rather than expanding. Im very eager to see what comes after Edge class.