Can you rIse the hallway ceiling height and leave the bedroom heights as mentioned? This is your best solution since the hallway is open to the open concept kitchen...

I love the general concept of beams and adding beams, but in this space with the ceiling as it is in the drawing, I think adding beams at lower levels makes things too busy architecturally, considering the soffitt and all of the other planes, angles, and openings.

I am trying to find interesting and aesthetically pleasing options for dealing with a 3.2m stud height in an architectural build for clients. It is open plan kitchen, scullery, dining, lounge all at this height and trying to decide if I drop down the ceiling over the kitchen side of things to make storage functional. Issue is a decorative beam running down one side of my proposed lowered ceiling. Any thoughts, images or comments?

Wow - what a view! Yes definitely take the curtains to the ceiling it will add grandeur and frame the view even more beautifully. You can get a custom bent track made that will take the curtains around the corner so the window is not obscured when the curtain are open. Contact your local interior designer - they'll know what to do