Are these bunks your own college kids will sleep in when they are home for vacations, or overflow for their visiting friends? My son is a college freshman and has brought a couple of friends home for a weekend when there was a concert here they wanted to see. Something like that would have been useful...but I certainly don’t expect to be entertaining crowds of young adults so often I would need to designate a bedroom as a bunk room. In fact, I don’t even think those guys slept in our guest room or even the floor of my son’s room, they all just crashed on the playroom floor, lol! And those top bunks are so close to the ceiling! Gives me claustrophobic anxiety just looking at them! :) Of course, if your home is at the beach all bets are off and you probably WILL be hosting tons of kids all the time, If you go with this, I think you are left with the bottom right corner for the bunks as you certainly don’t want to block that large window. You could make the closet smaller (which just sounds so WRONG to even type...who makes a closet smaller? :) ) but I don’t think you have to if you use that configuration. I would definitely do some amazing window treatments with gorgeous fabric bc that will be you focal point when you walk in. If you need an alcove for a tall dresser, you can reduce the size of the closet, and put the dresser in the bottom left. I’d leave the closet in the top left so as to keep the window centered on the wall. Hope this makes sense!

That layout sounds kind of like what the 2 bedroom units in the HOA I lived in when we were still in SoCal was like...The vanity area of the bathroom had a closet facing the vanity/sink side that was the two sliding door type, with a door to the toilet/tub+shower part of the bathroom to the right (left if you're coming in the door from the master bedroom) and a door to the master bedroom on the left (right if you're coming in from the toilet/tub+shower part of the bathroom) - another double door slider closet was in the master bedroom. They almost always painted all of the walls, the closet doors, and the doors in/out of each space the same color as the master bedroom because it was adjoining. The smaller bedroom accessed the bathroom through another door off the upstairs hallway, so sometimes that smaller bedroom would be painted a different color but not always. White (the same one as was used elsewhere) was a popular and sensible choice, you can always add color with accessories and art! White bedding can start to look dingy if you don't wash it in hot water (occasionally adding bleach to go into the load while it's running), so think about how much 'maintenance' you're willing to do before buying all the bedding in white (sheets and pillowcases in white aren't as big of a deal because you typically have 'decorative' pillows and a comforter/duvet covering them when you get the bed made each day). :) When we had the house on the market the 'stager' had us buy one of those cheap bed-in-a-bag comforter/shams/decorative throw pillow sets in white with a little area of patterned print down at the part that goes on the foot of the bed, which I thought was totally impractical given that our dog loves being on the bed and washing the thing would have made the fiberfill migrate around so it would be lumpy when it went back on the bed! At least the place sold in less than a month after being listed so we didn't have to worry about it for very long. :P

Some hotels have a hot tub in the bedroom but that doesn't mean it is a feature that homeowners would want in their own home. 😀 I am very much on the side of a homeowner doing exactly what they want when they build or remodel so if OP feels that being able to look out a window over their bedroom to take an advantage of a view would enhance his enjoyment, why not. Of course then OP would also be okay with having a bathroom that is on view or else having a curtain drawn for privacy. So OP if you can afford it and you think it will enhance your life go for it. Most people would find this to be detrimental but there is a lid for every pot. In my building someone remodeled and created a glass "window" from the living room into the bedroom. Not something I would do but the unit sold at a very high price per square foot so all it needed was one buyer who loved that feature.

If you are remodeling the Master, then do it once, and better, rather than just "tacking" on an extra room. For instance, it appears the bed can only go in the 12'x7' "nook," which leaves a 17'x9' completely open space (because of Closet 1/2/Bath doors). And are there any windows in this Master? And some oddities like the step, variated ceiling, and entering off the Dining Room. Some uniqueness and quirks are welcomed if they are the right kind, but if you have opportunity to fix some of these issues, then try to. In general, walking past or adjacent to a sitting room, rather than going through a separate set of doors from it, is common for a modern Master Suite (notwithstanding a boudoir in a period-correct house) when the sitting area has some feature to exist, like a window/view or fireplace. If it were an office or nursery, a separate entrance from the Master would be a reasonable decision for flexibility.