back to your initial question. Are you still open for features to include?
Well, I am working with trucks, and trucks don't have a 12V but a 24V electric system.
So it would be nice if if your dc/dc-converter could work with 24V input (which mean at least 32V input voltage).
The physical dimensions of the booster pack should not exceed the dimensions of the stellaris board.
It should be possible to put another booster pack on top of your booster pack, so there should be female connectors for all pins of the stellaris board on top of your board. Concerning the CAN-Bus there sh