It's easy enough to throw the armor, infantry, aviation, and even engineers on the map, but what's the best way to account for all those 'other' things that matter on the modern battlefield - electronic warfare (not just jamming but also detection), ground-sensing radar, counterbattery radar, chemical detection, FASCAM - without overly bogging down the game?
I get that many of those assets seems a little unnecessary given the nature of most wargames where you can see the entire enemy OOB as soon as you crack shrink on the box, but identifying (and targeting!) enemy C2 elements becomes a major focus of the intel fight for many units, and a lot of those detection tools will trigger particular decision points for commanders on the ground.
Are these separate card-play elements? Do you need a double-blind game to make this relevant? Without appropriate subsystems, is it worth even trying to implement (ex - orders delay in an arty call for fire, unless the arty is firing based on a counter-battery detection)?