Is it a question of scale? Y'all think 30m hexes are big? :(
The question is why potential recoil damage to infantry due to ERA
micro-explosives are worth modeling when the collateral recoil damage to infantry from a 250 kg hypervelocity HGR slug vaporizing 1,500 kg of razor-sharp metal scraps off a nearby IFV is not.
That and there's the whole thing of real-life IFVs that have begun to use reactive armor to help augment vehicle protection, so apparently real-world militaries are either not very concerned with collateral damage to nearby infantry or there's just not all that big of a risk for an infantryman standing near a micro ERA detonation, relative to the risk of an infantryman standing near a RPG or even full-sized tank shell that caused said micro ERA detonation in the first place.
But if you're concerned about the nearby trooper's health due to exposure to micro-explosions, Reactive Armor doesn't necessarily have to be explosive. What about NERA?