One possibility would be to swap the living room and the dining room. Since the current living room is larger than the current dining room you could still keep some comfortable seating (couch and upholstered chairs?) against the front wall for a keeping room/dining concept. Then your new dining areas (kitchen and dining room) and living areas (living and drawing room) would have good flow between them, which would work well both for family and entertaining. You could also add some builtin bookshelves in the drawing room or new living room to create a library area to add another fun element to the living areas. These bookshelves could be against the long walls in the drawing room, around the window with a window seat in the living room (former dining room), or built to create some separation in the open area between the drawing room and living room/stair area. Your plan seems to show some sort of builtin there, but I'm not sure what it is.

How do you decorate your place, what kind of style, colors, and feelings? That will greatly influence the type of door you might want. Also, think of your budget, and whether you want to install it yourself or hire a professional (you don't need to tell us, just keep that in mind). Then look around Houzz, in the products page, they have lots of interior sliding doors and hinged ones, from elegant frosted glass in a dark wood frame, to rustic reclaimed wood planks. You may not want to purchase that exact model, but it might give you a better idea of what would fulfill your airflow needs without sacrificing style.

Our bathroom is the smallest room in our house. Width = 5 feet and depth = 8 feet. This is this the size of our bathroom. What does this size give us ? A step over bathtub with shower, A small vanity with matching small medicine cab, a toilet (of course), shelves over the toilet, a floor to ceiling (skinny width) closet to house things like towels.

This is on 2nd floor. I've seen people reclaim their entry way, but to be sure I'll need to check with the builder on if its mine to rebuild. If not allowed, then shelf from 3rd picture will be the next best thing! Pocket door sure is an interesting idea, but the builder has already installed 3 ft wide door. I'll check on the cost involved then take a call.