I want to raise the ceiling height to 9 foot and do vaulted in the living room.

I want to center the fireplace so it is center for that wall.

Also I want to detach the island/ sink area. I think it will help the flow into the dining area.

What do you guys/ girls think?

Yes, I would ditch the peninsula in favor of an island to help traffic flow. I would also shrink the foyer closet so the top wall of the closet in your drawing aligns with the staircase. This will make more room for the island and better flow around it into the kitchen. 9' ceilings are a great idea and a vault in the living room creates an opportunity for adding beams or a wood ceiling in that space.

Also, consider a pocket door into the laundry so you can put hooks for coats on the wall that is currently covered by the laundry door. That's the door you will use most often and if it has a place for coats, you can make the foyer closet smaller.