Because I'm pretty sure the game won't have too many balance changes, and the original version's database files are locked down tight, I've taken a look here in order to make some of my ideal changes.
Namely; I've increased sensitivity gains, I've increased the influence of sensitivity on adrenaline gains and generally increased adrenaline gains a bit, enemies now reduce SP right before they try to insert (incentivizing actually struggling out).
And perhaps most importantly revisions to the virginity/hymen/struggle system. For one, because adrenaline/sensitivity increases more easily the SP is more likely to be higher. Second, the struggle progress per button press is now slightly randomized and generally takes some more presses. Each button press increases adrenaline more. Being at less than half health will increase the SP cost. You're really going to want to improve your SP and keep it up. Ambushes from elite enemies can be pretty brutal now, too. Virginity now gives a slight attack boost and a decent defense boost, hopefully some incentive to try to keep it around besides thematically and potential VP gains. Essentially, this makes maintaining virginity much more difficult if you're actually trying to keep it.
Considering I'd have to re-do my work when a new version gets released, I'd probably wait till the game is more feature complete, or the release version. And, I think there's still a little balancing I went to test out for the late game. But, I wanted to see if there was any interest in changes like this.