It is stats we can add if we need it but we didnt see any instance where we needed to tuned those values specifically for different unit or unit types.
Regarding light cover, its something we are thinking about. One step at a time though especially with changes like these. If we change too much stuff too quickly it may result in undesired results. But I do understand your point.
Regarding explosives generating green cover, possibly but this might not be something you want. All Green Cover in the game thus far can be destroyed. Cover created by these type of explosives will not be destroyable because it'll be terrain deformation.
Too much green cover on maps will also slow down the pace of the game. Something to keep in mind.
Thx for the answer.
Note that i'm wanting only few specific big ordinances been able to create green cover. No vanilla unit/ability and just specific commander offmap/units which have a high cost/cooldown with low amount of shells/explosives.
I'm not sure if you forgot, but terrain deformation cover type gets overwritten by the last explosive type. Grenades, mines, mortar, tank shells, artillery, etc will make all green cover into yellow cover. So you could still "destroy" or alter this type of covers.
Even undestroyable things such as on maps trenches or walls (like the ones in Rails and Metal) will lose green cover (at least visually it appears as light cover) property over something as simple as a grenade.