It would be nice if all headers and screw terminals would be flipped to the capacitor side, too. For the sake of slim packaging.
i'd prefer double-row headers for standard IDC ribbon connectors. It would be nice if the ST-Link could just be plugged into a 2x5pin IDC connector. No more hassle with wiring.
4 more GPIOs for end switches would be good. All on 2x5pin IDC connectors for quick and simple wiring. Just one 2x5pin header for each motor stage, with all the Encoder and end-switch stuff available on signle headers
Edit: There are special cables for the ST-Link https://www.aliexpress.com/item/STM8-STM32-adapter-line-easy-connection-for-st-link-stlink-v2-only-for-Baite-st-link/32584707499.html