Yeah that would be ideal! But the unfortunately the printer FPC connector isn’t just GPIO/data lines. Several are drivers for the printer motors. Buried in the tinker thread I mention that I have plans to design an EXT board revision that keeps the printer and usb functionality, but reworks the printer ribbon cable to be general purpose (this would involve a separate driver board for the printer). After a revision, the 24 pin FPC connector would be replaced with a 40 pin “pi-hat-safe” FPC connector.
Here are those 24 pins for the printer FPC connector so you can see for yourself that they aren’t really usable GPIO/data pins:
