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.

I agree with divadeva. More lights. If you can add pot lights do it. If they're already there add task lighting and up the wattage on the bulbs on the pot lights (replace with LED and you can make them brighter because the wattage on LED is lower for brighter light). If you have all of that add decorative lighting. If ventilation is an issue find a way to move the air around or add air filtration. Maybe the HVAC is deficient. Maybe you can add a HEPA filter instead of the standard one that comes with the unit. Call an HVAC specialist to see if there is a way to boost air flow in the room.

Thanks for clarifying Sneha. Its a north facing property so the TV unit is placed in north , are you willing to compromise on that if you need a pooja room in NE. Please include the directions in the plan to avoid confusion. A four seater dining may not be of much help as the width of the table remains approximately same its only the length that is reduced. We also need to maintain safe distance from the TV unit plus we have a french window on the west side. It may require some structural changes, in discussion with your designer, to the plan to accommodate a pooja room without compromising on the looks. Are you willing for that. Thanks, Nitin Cornerstone Designs.

Actually the plan ( in black background), the one with measurement is the original one drawn by an architect . The other drawing (3d n the colourfull) is just a plan i drew to have an idea , where to arrange the furniture nd some modifications using a software called MAGICPLAN. That is why the staircase and bed is of awkward sizes, my bad. About the modifications, i have removed the partition between living and dining, have made a space for handwash, storage spaces for one bedroom and in kitchen which is protruding outwards marked with slanting lines in drawing, also extended 60 cm on northern side of the house to make room for balcony for bedroom, more room for bathroom nd work area. Do u think there is less space for storage, like to fit in an godreg alamarah somewhere??