Quoted from CoreyStup:
All those eprom socket options is a waste. Replace with a single 28 pin socket for a 2764.
Just like single eprom bally-35 boards, people can combine the existing rom images (A/B/C) into a single 8K image and go from there. Easy.
If that is the route taken then may as well go larger and do a combined ROM for all the GamePlan games and just DIP switches to select the bank and the one chip does it all.
Having the option for a single combined ROM is nice but it is also good to leave the option to use the original ROM chips and just move them over. I can see dropping support of the odd TI chips that need the negative voltage.
Any of these are already a huge improvement over the original board. Cutting traces, adding wire jumpers, etc sucks.