I would not do double doors. If you had a single door and scooted it closer to the vanity, the tub could be centered on the window. It looks odd the way it is, for sure. I question the functionality of the linen closet being accessed from the toilet room.

How about putting the tub parallel to the window.

I agree, linen closet in toilet area seems off. Whats on the other side - could it be made to be accessed from the other side?

What if you turn the toilet so its facing the shower - would you be able make the toilet room narrower and expand space for vanity - seems a bit cramped - maybe nice to have more space btwn sinks.

I agree tub is generally centered on a window and is the focal point or the vanity area is; pick your passion and redesign around that and yes the linen closet is in a poor position.

I would switch the shower and vanity. Move the vanity a little closer to the wall by toilet. I would also center the tub under the window.