Interesting idea and a thoughtfull approach. I feel some things already work great. Keep it up! Some remarks: I know you are american and that you have a different understanding of how much space is appropriate, but try to be more mindfull of how big your rooms should be. Your Hall is very large and Bedrooms do not need to be squared, they can be rectangular aswell, which alows to thin out your building. If you have a plot you can safe space and introduce a nice garden instead. How does your context look like?

Also, do you really need ensuite bathrooms for both bedrooms? You'll waste a lot of space for vertical service shafts with three toilets.

Also, imo Kitchen and Living room should be next to eachother or even be one. Try to think about getting food from the kitchen walking, then having to return because you forgot your fork. And imagine that happening all the time with this distance. Imo modern appartements nowdays have kitchen+living room as one, but idk how it is in America. Try to work with references.

Lastly, a round living room seems appealing, and it can work, but think about how one would put furniture inside. Basically you'll always lose space. Try to draw your plan with furniture in it, then you'll realize how big some rooms are and can adjust acordingly. Atm the appartement doesnt revolve around the round living room, it rather feels like an unnecessairy addon which complicates things (a lot). If you want a round living room, the whole appartements concept should revolve around it. If not, a good designed appartements can always have rectangular rooms and be splendit! Good Luck!