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.

This is the terrace- we have rules here where we cannot have a permanent structure on the terrace. So we have to make do with portacabins- trellis - plants etc- want to build seating alongside wall and keep a table etc. furnish upholster and decorate- Mughal-esque. Also we have to use weather durable stuff as we get extreme heat/ harsh winter no snow/ extremely dusty and dry heat.

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.

Thanks for your advice. Please note that One longer side of the "L" portion is used to pass through, but the shorter side of the "L" portion does not open up so if need be i can put something. there is a french window which is fixed and cannot be opened up on the shorter side. that side is only useful to get some light in the house. My living room is in white and grey combination. Do u want me to have a rug in the same combination or anything else would be fine. Would appreciate if you can suggest a kind of vase that would go with it. My theme is modern style in the house. I was initially thinking something like the attached picture. pls. confirm ur view on it.