Welcome to the Forum!
I love your profile!
But I would definitely add a tongue box build into the curve as suggested.
Ant for extra cabin space I would lose that large cabinet attached to the back of the galley, or at least down size it to just meet your needs.....flat screen, stereo, etc.
Or just a shelf to hold a sweatshirt or light jacket for those middle of the night trips to the bathroom.
Another thing I would consider is a "basement"

This under bed storage is wonderful.
We are currently on our second build and have 1" of extra height in our new cabin, and when I asked Sandi what she how she would like me to use that extra space? She replied "make the basement deeper.
With "Miss Piggy" we have 8" (just enough room for those Rubbermaid under bed linen storage totes) "Kermit" will have 9" in depth and a full basement rather than a half. All of our clothes get sored in these totes!
Good Luck with your build.
Brian & Sandi