The first thing that bothered me in this room is the distance between the seating area and the tv area and that both seem unrelated in everything. I think what you should do to pull everything together is the following: 1) Move that sectional away from the back wall and the curtains (placing couches against the wall is outdated now) and closer to the tv 2) Center the coffee table under the chandelier with the sectional placed 16 inches away from it 3) get a console table of a height equal to the sectional's back 4) place few decorative items, stacks of books, candles, lamp shades whatever you find suitable on the console 5) someone mentioned that the two accent chairs are not in scale with the room. I totally agree with that. You need wider chairs with a low back 6) A rug is a must and two are better than one, layered of course !! But make sure the biggest one is big enough to place all the seating on it. 7) pillows and a throw will add warmth and texture too...

I think a comfortable distance between the island and the counter is around 42". It seems that you have only 30" between your cook top and the counter. I might be a little too tight. The wall between the entrance and the kitchen could be 4' long instead of 6', you would then be able to move the island a foot which would give you more room between the cook top and the island. Could you switch the location of the toilet and vanity in your dad's bathroom so your enter facing a vanity instead of a toilet which is a lot nicer.

that is what i have added if you can see the pic above.. want some suggestions on partition that i can use between dining and sitting

I feel partitions are not needed. You already have too much for the space. Adding a partition will shrink the space further. The simplistic solution, you do not wish to discard any furniture would be to paint all the walls in lighter pastles. And use some wall painting frames to highlight certain walls.