For instance, things like plasma batteries (guardian, punisher, etc) become severely overpowered when attacking certain targets, by virtue of their high default impulsefactor and AoE. Yes, I could just reduce thei impulsefactor and AoE and be done with it, but from both a realistic and a gameplay perspective, it doesn't make very much sense. When you fire modern-day artillery high into the air, when it comes down it hits with the additional force of the kinetic energy from the speed it gained on the way down thanks to gravity. For instance, drop a penny from a one-storey house's roof, and it bounces on the ground. Drop it from the top of a skyscraper, and it would not only be lethal, but would probably go several inches or something into pavement.
While plasma in the TA universe doesn't necessarily have the properties of a penny, it's reasonable to believe that the energy released upon impact from a high-velocity, high-altitude shot would be far greater than a direct-fire shot. So. I have two weapons, each activated by the shot being fired in a different range of angles. Direct fire has a small AoE and nill impulsefactor, high trajectory explodes and devastates the entire immediate area, throwing small units into each other and buffeting larger ones. Looks great, but is a little hacky.
You need to revisit basic newtonian physics. An artillary projectile only loses energy to air resistance the longer it's airborne. If the artillary has enough kinetic energy on firing a projectile to push it a few thousand feet into the air, then it has that kinetic energy weather it fires it at 10% or 80%. A projectile fired several thousand feet into the air will be traveling slower then a projectile fired at low trajec because the longer airtime exposes the projectile to more air resistance and gravity is a null, because it works the same way pulling an opject with momentum moving away from it down as it does with an object moving towards it. 9.8meters per second constant accelleration, this applies to both decelleration and accelleration.