Edit: errr useless without*
I got to a point where I could kill a big spitter, and it didn't drop any loot or do anything! I checked inside the mod, and it only gives loot for RPG systems with a specific 'potion'. Could you add loot to it for normal mode, like half a stack of the best available science? Maybe a new technology, like a bigger storage tank such as the Storage Tank Mk2 mod? Could make it drop a component, too, for an extra-large tank (giant shell, etc), so you need to keep killing them if you want more tanks.
P.s. excellent mod