My DH and I did a B2B last December, an Alaskan cruise this summer and have a B2B coming up this November/December. Last year, we also wanted to go casual and pack light. Great idea and we did it again for our Alaska cruise. Never went to the dining room and had great food in the buffet. After all the cruises we have taken, we have been to the dining room many times.
We did not miss the experience of the dining room at all, the food in the buffet on HAL is the best we have experienced. Lots of choices and always fresh including steak and prime rib.
To each his own.....