Hey! Glad to hear that you're getting some use out of it. I realized in post that is basically what would happen to the Super if it's alone against 5 characters. I wanted the turn structure to work similar to an Eidolon from Wallflower. A workaround is to give your PCs some grunts to fight alongside to increase the headcount at the start of combat and just quickly kill them off before they become a problem. Or just don't run it that way. You're the GM, you have final say.
Turn calculation is done at the very start of combat before those drones could be deployed. So unless you have RPV characters from somewhere else helping your party the drones that come with the Hydra would not count versus that total. The drone that deploys with the Hydra would technically be a hostile character, but that drone also doesn't take its own turns so GM Fiat for whether you want that to count or not.