Convenient as they may be, rotating shelves come with a cost: usable interior space. I think this type of system caught on for a while because people were replacing much smaller capacity refrigerators in the mid 50's, and even with the loss of usable space, when new these GE's were still able to hold more than most people's previous refrigerators.
As a daily driver, this style may be more functional with the rotating shelves but it can't hold as much as an average sized modern fridge. Hans seems to have discovered this rather quickly, but I hope my suggestions will help him make the machine more practical for him.
The reason I dislike top-freezer refrigerators is because I don't like having to bend down and reach way in back for something. I like my rotating shelves, but again, I don't consider my Combination a practical choice for a daily driver. It's my drinks fridge and that way if it decides to fail after 50+ years in service, it was just my overflow fridge anyway. I've gotta say that with the bottom freezer arrangement, Hans has a great unit there, with fridge section at eye level plus the convenience of rotating shelves. Absolutely the best of both worlds, and visually about as appealing as a midcentury modern fridge can get.