I'm not sure how many other people would like this, but I'm using the two ADC chips on this board for different pieces of hardware, both of which need a 5V supply, and it would have simplified my life if the ADC Pi Plus had a second 5V pin at the other end of the row of inputs, i.e. adjacent to input 1.
I know I could grab 5V from the stacking header on the other side of the board, but that means I can't plug the hardware in with a single connector (and the pins on this stacking header aren't very satisfactory -- they seem to be too thin to mate securely with the usual crimp connectors).
Just a thought for the next time you're designing something like this!