I sailed on the Oasis in early January, and your comments very much reflect our opinions as well.
The Oasis is a beautiful ship with top-notch entertainment and neighborhoods to satisfy everyone's tastes. However, we were very disappointed by the level of service, the quality of the food, and the crowds and behavior of the many thousands of other passengers. My wife and I have been on ~15 cruises on Royal Caribbean, Celebrity, Princess, NCL, and Carnival and we would have considered returning to all of the ships except the Oasis.
We are now planning our future cruises on smaller, more intimate ships with better service and food. We found some great deals on Azamara Club Cruises so we will be doing a European cruise next week and an Asian cruise in March. I'll try to post a trip report when I return.
How did you like Crystal? I would also like to take cruise with them (and Seabourne).