Here's the second floor plan.
How does one enter the master bath from the master bedroom? A door or framed opening must have been omitted.
Yes that was an oversight and has been added!
Simple and comfortable.
My one concern would be the lack of a tub in the master bath (and no possibility of adding one in this space). Even if you don't care about it, it could be a sticking point for a future buyer.
This is one of the most straight-forward plans I've seen in a new build in a long time: I like it. So often, they are labyrintine in complexity.
What about completely flipping the WIC and Master Bath to put all the plumbing in the wall between the shower/toilet and laundry area? There may be some reason with the windows that this doesn't work, but that is something I would think about.