Love the Radiance class. They are smaller ships with less bells and whistles than the larger ships, no surf simulator, slides, etc. but to me they are the nicest ships. You can see the ocean from almost anywhere on the ship. The Windjammer has a large outdoor seating area on the aft. I would compare it to Celebrity Summit which I also love.
Just off the Adventure Saturday and the library was open, but no books to speak of, only books left by passengers. There were actually quite a few and I left four or five of my own there.
As far as your D status, the thing I like the best is that not only do they add four drinks a day to your seapass, but you can drink them anywhere at any time. I think Celebrity still only allows drinks in a specific lounge at a specific time.