Mr. Jim,
I agree. I do not think Oceania and Azamara are luxury lines, But, they are very nice cruise lines. When we sailed both lines we thought the regular restaurants were a smidge above Celebrity. We thought the speciality restaurants were a smidge above Celebrity specialty restaurants also. The service was comparable, even though Celebrity has many more passengers.
We sailed in the Owner's Suite and the forward Vista Suite. We could only enjoy the forward veranda when we were at slow speed, very windy. The rear Owner's Suite is our second favorite suite. The "M" class Penthouse is very hard to beat.
If you like a quiet lounge with a drink, you will love Oceania. We are not partiers at all, but Oceania was too quiet for us. We do like a little night life and active casino. But, I am betting you will like your cruise on Oceania.
All of the above is a personal opinion, which I usually do not give because everyone is different. 😊