In the master bath, is there room on the vanity for two sinks? Looks a bit crowded. I know as my parents get older, they need more counterspace and below storage for stuff.

Imagine, every time you go in and out of the bedroom, you have to walk around the dining table. If this is a retirement home, eventually you may be doing it with a cane or walker, and as my dad can tell you, walking around things is a bother and trouble.

Where will you store your dishes, glassware, etc? You don't want to have to carry it across the room.

i don't like that the power room is visible from the dining table, and from your bedroom door, and from the kitchen island.

I like the laundry room and office. Maybe you'd like a window from the office overlooking the patio, too?

For the powder room, you could switch the entrance so it's inside the laundry room. I think I'd rather walk through a laundry room to use the washroom than be able to see a toilet while I'm sitting at the dining room table.

Much improved from the prior plan!

One other option for the half bath is to switch the commode and sink to the laundry room side wall and move the door over. This would keep "sounds" from any guests using the adjoining bedroom and would move the commode out of the line of sight from other rooms.

Right now I'm sitting in our living room which has the same dimensions as your kitchen, and I have a hard time imagining a kitchen this large.

True. You have room to move the peninsula 18" into the kitchen, so the reach from range to sink isn't so far, and the counter stools aren't in the hallway.

Flipping the powder room a la omelet is a good solution.

Kitchen: Too interior. Too big. Too much space in the middle. Don't waste an outside wall on a pantry when you could have windows.

MBA: Too small. NOT enough room for two sinks with 'elbow room' for both. Prefer closet near sinks. Think about towel bar locations. Prefer door farther right, closer to closet door.

M Closet: Too big. No windows in closets; daylight fluorescents.

MBR: Skip the chair and table nook. You have an office to use as an alternative to main living area.

Office: Do you need one? You have two guest bedrooms. (No side windows?)

Garage/Family Entry: Where is it?

Guest Bath: Larger than MBA. Can't this double as a powder room if you move it to between the two guest bedrooms? Is this so large because you're making it ADA compliant?