Something like this may work. Note the changed door positions so that anyone in the bedrooms can visit the bathroom without disturbing anyone else in the lounge !

The architects have spoken. I have worked on a couple of building in India somewhat similar and know that this is well liked and fairly common. It does need to simplify but you can do this with color so that the parts introduce themselves not all at once, but with a sense importance relative to the massing. With deft coloring you can give balance and you can make the parts feel like they belong to a whole. There is no need to be simple in the Meisian sense. Lots going on can be quite nice. But with a detailed building as with a person, when you meet them you don't need to know everything about them, see the baby pictures, see the scars from their latest operations. No, you just want the person or building to make a good first impression. Then later as you get to spend some time with them and get to know them you can discover all their intricacies.

You've got a great space here, and there's so much you can do with it! Do you know what style you're looking to achieve? If you've already got a red and white colour scheme going in your kitchen, you can always opt for this in the living room. Sometimes grey can make the room look a little dark, so it's always worth investing in a white base, and build from there. Maybe change the colour of the curtains to something a little lighter and richer?

Thanks One Plan for your recommendation. Would it be good to go for Herringbone pattern in hallway and in the open plan vinyl straight planks and then matching tile in the decking area. We have shortlisted karndean vinyl for open plan (Von Gogh Distressed Oak) althought not sure. Also what type of anti-slip material should I go for if I had to matching wooden look vinyl ?