I can't comment on Rose & Crown; I have never been there and overall the menu does not woe me away from the so many other options in Epcot. However, the reviews are very favorable of R&C.
I so much want to say I love 'Ohana, but that is not the case. It use to be a must do for us but they have changed too many things for my liking. Also, while I am a big time carnivore, it's just been too dry and underwhelming of late. It is no longer on our must do list.
I like the Fantasmic Dining Package but H&V is not a choice for me. In my opinion it is typical institutional buffet food fodder that is just not very good and made for mass numbers of people to scoop up. However, there have been many who have said the character experience was very nice. There have even been some who say the buffet food is not bad either. Perhaps it's the pixie dust affect with the characters that is making the food taste better or they also love Golden Corral. And who knows, maybe, just maybe the food has improved from a couple of years ago. It's buffet food and I doubt it's any better today than back then. However, take my opinion of H&V with a grain of salt... I really don't like many buffets which now leads me to the next restaurant.
Boma is the buffet restaurant that is truly an exception when it comes to buffet restaurants. Boma is perhaps one of the finest buffet restaurants that I have dined at. I still will not call it fantastic or great, but IMO it is good. It truly stands out as much more than mass produced buffet food fodder as is H&V or just about any other lunch/dinner buffet found in WDW, a Golden Corral or any local Chinese buffet restaurant. Boma is not a must do for me, but it is one of only two buffets in Disney we will eat at other than breakfast and do go there occasionally. And coming from a buffet hater, that is a big time complement to Boma.
I also love your choice to keep CP and your early entry into the MK. While I am not a fan of buffets, I do enjoy a few breakfast buffets and really do enjoy CP and is always on our ADR list for early entry. The Breakfast Lasagna is a total addiction for me.