I like it! And
there's your justification for having so many melee units. I'd imagine some of the demonic units will be corruptions of existing stygian military units. Hence the possible justification for a later release of succubi without the crab claws. Or you can go the other way, releasing a demonic version of a stygian warrior caste unit.
This might also help you with the problem of finishing an army before going onto the next one. The Stygians will be "done" relatively soon. Which means people can buy armies with confidence. But you can always go back and add units later that allow players to field themed armies that are more specific.
So let's say (hypothetically) you make a human army. You've got PA infantry, infantry walkers, armored vehicles and air support. To add spice to the mix, you include bioroid units of genengineered, biomodified troops. They're optimized for close combat and fun special rules. Then in a later release, you have another genemod unit, a different design from the same lab. And specialist vehicles designed to fit their doctrine. Now suddenly you can release only another unit or two and they're a faction in and of themselves. And you didn't have to do it all at once.
Anyway, just a thought. You're incredibly prolific and I have a vested interest in making sure this stays fresh and fun for you.
