Since you are asking, my preference is to have the closet closer to the bathroom.
I am not pushing my layout, I simply want to offer ideas/compromises. The layout below shows what Karenseb suggested. I think it is a nice option. With this layout, you might need to steal 2 in. from the bedroom to accommodate for a thicker wall for the niche in the shower. Even if you steal 2", I think 4'1" on each side of the bed is fine. I agree with Karen about a door for the toilet area. I would not put one and plus the space in front of the shower would feel roomier.
I made the toilet area 2" narrower because I wanted to slide the closet pocket door on the other side while making sure that it is not in conflict with the bathroom pocket door. The reason for this is that I want to place the shower towel bar on the closet wall. You have a better access to it when you get out of the shower.
I read that a 2-sink vanity is a must. I would not go less than 6'0" (and would put the sinks far apart to get decent size drawers in the middle).
As for the 1 ft storage on the East wall. I am not a 100% sure because I am not sure how much you can store in them but I just wanted to give you the window seat which I agree with you would look very nice.
I measured my luggages and they are less than 1 ft thick so this would fit in this place. You can put shallow hampers for your laundry. You could also store extra bathroom products and maybe towels too depending on how they are fold. You can also store cleaning supplies.
If you are a shoe lady, you can always store extra pairs of shoes there :).
EDIT: If you want, you can keep the toilet area 3'0" wide by having a 2'0" wide closet pocket door. A door that size would not be in conflict with the bathroom door.
Q
like these doors
Q