Honestly, I like very little here ... so much wasted space. Specific thoughts:

- Note that the door opening into the suite covers the lounge /study. If you move this door to the other side of the bitty entry hall, the door can "park" in the entry hall and avoid covering the lounge /study door.

- The lounge /study is a nice idea ... but it's large for such a space. How do you intend to use this space? What furniture do you need?

- On the bedroom side, one spouse has to walk alllll the way around the bed to reach his or her side. And that spouse is a looong way from the toilet. Placing the bed against the exterior wall would make for a better traffic pattern.

- Still thinking on the closet ... with so much space, I'd want some type of a cabinet topped with a mirror as a focal point upon entering the closet.

- I'd reduce the size of the bed chamber. So much space ... so much light ... and a bunch of empty space. Bigger isn't better.

- On the other hand, I'd like to see a bit more width in the walk in closet, especially for the longer end /the end that's actually behind the bed. You need 2' on each side for hanging clothes, and that leaves you 30" of walking space. Yes, it's technically enough, but with so much space to play with, you can afford at least 3' walking space, which will be more comfortable.

- I understand your idea in not using the "end of the hallway" so you can have a window. It'll be the focal point upon entering the suite. It's wasted space, but it's more acceptable than the other bloated areas. I'd put in a chest of some sort (linen storage?) and have a small window above it. A small chest would also allow you to keep a small lamp burning in this spot at night, which would be quite welcome when going into the bathroom at night.

- I vastly dislike everything about the bathroom. SO much space -- what is this? I'm guessing it is more than 200 square feet? -- and most of it is walkway space. Two vanities with little storage pushed up against one wall ... a tub in the middle of everything ... no linen closet. And two toilets-in-closets, which will be used about 10 minutes each per day? You could do so much better ... in half the space.

- I like the idea of no door into the closet ... but I fear the bathroom will be cold with no door. Of course, as oversized as it is, it may be cold anyway.

- Is that a sliding door to the balcony? If so, I like that. This suite doesn't appear to be near the main house's exterior doors, so a sliding door leading out to the back or side is good for fire safety.

A 4'-0 balcony is not usable.

I'd say it depends upon how you intend to use it. If it's a "stepping stone" to a patio we can't see, it's great. If it's just a spot to step out and see how the weather feels before you dress (or a door so you can let the dog out into the yard), it's fine. On the other hand, if you intend to have a couple lounge chairs and a small table for drinks ... nope, not enough.

Considering the average size is 3*2, 4x2 works fine for me

I don't believe 3'2" is the average vanity size; even the old farmhouse in which I grew up had a vanity larger than that. The only vanity I've ever had that small was in the 1375 square foot entry-level ranch house we lived in when we were newleyweds. My daughters' college apartments had vanities larger than that.

4' isn't a bad size, but it's out of proportion with the rest of the bathroom. Have you gone down to Lowes or Home Depot to see just how big a 4' vanity is?

A 4' vanity is fine IF you have ample storage elsewhere. I have a 4' vanity in my bathroom now ... but I ALSO have a small linen closet that holds the hamper, extra toiletries, and more ... AND a baker's rack that holds towels and small baskets that hold various things. A 4' vanity /no other storage IN the bathroom ... will be disappointing.

Most of the large windows are fixed glass.

If the windows opened, the nighttime cross-breezes would be wonderful. Of course, that assumes you live in a place where you could leave the windows open.

Storage for towels etc will be under the vanity.

Bad plan. With so much space, why would you want to store your necessities in this small space /the only space you have for storage of toothbrushes, make-up, hair dryers, and so many other things that belong near the sink.

Make a list of the things you currently have in your bathroom. Consider how it'll all store in this small space.

Closet is actually bigger than we’ll ever need. The final size will be about 7’-6” * 19’

The closet is plenty, plenty, plenty long ... but it's not wide enough. This is the width you'd expect in an apartment or a small entry-level house. It's out of proportion with the rest of the suite.

You asked for advice. Did you really want it? You seem resistant. I think you're too close to the design /can't see the faults.