What I would like is a package of poker chips (compatible with existing A&A versions) to use with 1914. I find that there simply isn’t room on the board for all the different stacks for each army, especially on the crowded western front.
So I just give each nation a single stack of chips with the required infantry unit on top.
The system I use is:
grey/white = infantry
red = artillery
green - tanks
blue = fighters
Additional colours might be reserved for new units vis:
black = bombers
yellow = cavalry
A nice touch would be for each colour to be embossed with the appropriate unit type.
Equivalent pieces for ships aren’t as important but maybe double sided chips for naval units?