Im German so sorry for my bad English.
First of all: Great game, keep it up!
Some days ago, someone posted an idea of earth containing liquid. It made me think and i realized, that in RL the range of explosions depens on where it explodes. I mean, in earth its smaller than in the air. It would be a nice tactical feature, beacouse you habe think about the materiel on wich the enemy is staying and if you are able to hit him with an explosion. It isnt Important now beacouse there arent that many different Materiels but later it could become Important, ecspecially when the first Hazard-Maps  will be played.

Mfg, Renschnitzel