2.3" 16 segment common anode LEDs, HT16K33 and ULN2803 (now common cathode)

I cannot see any problem with it now. I hope you agree with me that changing the transistor and resistor position makes it easier to read the schematic.

If you plan on making a PCB I would recommend making a full schematic and use a program that can coordinate PCB layout with schematic, this reduces the risk of errors.