As the design process moves forward and I think about how we use things, I realize that pretty much the only thing we use our refrigerator's freezer for is frozen fruit for smoothies. In contrast, our fridge is always stocked with tons of fresh produce (a lot of which freezes in the back -- grrrrr)

Well, in the new kitchen we are planning to have a dedicated "smoothie" station, where the Vitamix will be in a cabinet on a roll out, with an ice maker installed under the counter. I was thinking then maybe next to the icemaker I could do a Freezer/Fridge drawer combo, and then have a 36 inch Fridge only as the main fridge. We still have a chest freezer for the random frozen pizza kind of stuff.

Is this a crazy idea?

I have an upright freezer in my laundry room, steps away from my all-fridge in my kitchen. We, also, eat a lot of fresh produce and the average fridge couldn't accommodate it all well and we had the freezing problem, too. So glad that doesn't happen anymore!
I want to put drawers or small fridge in an area that we'd use as our beverage center to keep the rest of the family out of my work area, so I think your plan is stellar!