Thanks for the update, sorry to hear about the food critic, I hope she calms down or decides it's so bad she goes elsewhere to eat.
The broadcasting the talks is new since the re-start and seems very sensible.
We've sailed in all categories and they all have their advantages. The Britannia dining room is much more impressive so it adds to the occasion especially on formal/gala nights.
Britannia Club on Queen Elizabeth is good to have the additional items and your own table for 3 meals but the cabins aren't in a great location.