The Feast Watson product is a great finish it will tone down the white wash look still leaving the timber shining through. the only down side is, if is going over an old polyurethane finish you may have some trouble with adhesion, it would pay to try a small area as a test first, there is nothing worst than seeing paint peeling off due to adhesion problems and it's a major fix up after. Good Luck.

Perhaps light grey overhead and Japan black lower. How high are your ceilings? Inspiration shots below. I agree 2700 would be too high in black but 2400 would be fine.

the other thought i had was to swop the bedroom with the wiw and ens so that the entry to the bedroom is from the hallway and the ens and wiw are facing the rear..some variation of this idea would allow a north aspect for the bedroom and bigger wiw and ens and the "bump" from the hallway adds a little more space for the entry and adds to the interest for the long hallway but is not essential

Hi Wren, what a lovely setting! I would be inclined to match the door colour in with the exterior wall colour. Include the casing, threshold and trims as well and this way you will end up with the timber, black and your main paint colour to give a better sense of balance. Good luck! Regards, Kathryn.