A family sitting room with three doors. How do I stop it feeling like a hallway?

Mrs B and her lovely family- husband, two children, a dog, cat- had just moved into a beautiful Edwardian "forever home". Mrs B loves interiors and had got cracking on the kitchen, the formal sitting room and bedrooms. However there was just one room for which she could not think of a suitable layout. She stared and stared, tried to live in it for a while. Really got stuck. I was able to pop along and come up with a solution that ticked all the family's boxes and complement the rest of the house. Mrs B was delighted:

With a written document fully translating each pin and the reasonings behind it.

Mrs B has yet to implement her scheme, but that's fine, that's the point. A new house, there's lots to buy, many projects. They've been able to switch things around, improve the layout of the room. As soon as they have the budget to complete the room, they have a plan to do it. They also have an idea of how much it will cost before they even start. As and when they need to buy a new lamp, a new rug, they can do so accordingly to the plan, knowing it will all come together in the end. No wasted purchases.