Glad to come back and try to help. I have an affection for MCM homes and would love to see you make yours work better for you while maintaining true to your home's architecture and personality. So you MUST showcase that Saarinen! If you don't, give it to me. :) How about this? Change to a range. Put a microwave in the upper cabinet next to fridge and a second oven, if you really need one, below. Alternatively, I've read some folks here at GW have nixed the microwave and just use a speed oven. I'm not clear how that works as I've never had a speed oven nor do I really understand how they function but that's something you might want to research. I guess it all depends on how you use your microwave, how often, etc. Casters - what I'm thinking is that you could have the lower cabinets there put on good industrial casters so you could pull that counter out and move it to use as a peninsula on the occasions you need more prep space or for buffet service. Alternatively, is there a pantry or some other area where you could store a small kitchen worktable/cart that can be easily rolled out when needed? Sink: I would get a large single sink. Even one of those awesome Stages 45 sinks which would work well in your space. Quite often on the wider sinks, people will have two faucets. One on the prep side and another on the clean-up side. With a wide sink like that, there is enough space for people to use the same sink at the same time for the different tasks without crowding each other or fighting for use of the faucet. When someone isn't doing clean-up, you could have two people prepping at the same time. It looks like each side of the sink would now have ample counter to do so. Also, moving the range into that niche provides you a nice separation from sink to range so one person can prep to right of sink while someone else cooks without them being so close that there are congestion issues. Here's a an alternative idea to make use of the under stairs area unless it's being used for something else. If the stairs rise high enough, would it be possible to inset the cabinets into the space under the stairs? So the uppers don't show here as they are inset under the stairs. This allows the lower cabinet to be more accessible by the cook if they need to place something to the right of the cooktop, giving them more counter space to do so. It also makes it easier to slide into the bench seating next to the amazing Saarinen tulip. I think it will also showcase the tulip better as it won't be so crowded by cabinetry. I actually thing I would nix the upper between window and door because it will impact the light flow and airiness in that area and crowd the door much like the fridge would. Put your daily dishes, silverware, and glasses in the drawers next to the DW. It's easy and convenient storage. I love storing my like items in drawers instead of uppers. And it's at the end of the run where someone can get a plate or set the table without getting in the way of anyone doing clean-up, prep or cooking. And it's close enough to the fridge where it's handy for grabbing a glass to get a drink.

I'm familiar with these concrete floors from other FLW houses of about the same period, but for the life of my I can't remember their kitchen floors. What was the original tile like?

You have good bones to play with. The kitchen is nice! Looks well-preserved and well laid out--lucky you! I'd love to see it with a turquoise floor. Bathroom could use a colored floor as well. I'm not sure what your budget is...but Marmoleum would be super nice in both rooms, and comes in fun colors. I'd replace all the replacement hardware with original style hardware.I see one boomerang in all that. You need ALL boomerangs! Or at least something a tad more MCMy, preferably in chrome and/or brass.

I would suggest marble rather than lacquer for the family room. My friend has a kitchen table where she used leftover marble from her slabs on a "tulip" base. It has gotten lots of abuse and still looks fine. Lacquer is more much delicate just as wood is more delicate than glass or stone surfaces. I spent a long time looking for the "perfect" coffee table. My aesthetic question would be why don't you want some element of contrast in the room. The wood MCM style tables have elegant lines and might be a bit of visual interest in all that white and pale.