Happy New Years, everybody! I had a wonderful, well-thought-out post, and then Chrome crashed and it was all lost. Don't you just hate that? :/ I'll get to replying to you soon Loki, right now though my time is limited, so just this guy.
Thank you for your feedback! I'm glad you think it's a good idea. My hope is that if I can assemble a design team beyond just 'me' I can make this into an actual RPG with pdfs, an SRD, and a character sheet app (I can do MOST of that, but not all, so it's not as outlandish as it sounds).
Willpower is not exclusively against magical threats! It is used any time anything tests your self-control. If you down an enemy after a long and difficult fight, Willpower is used to -stop- hitting him after he goes down, for instance. Not much, for most characters, but characters in a rage or who are wrathful or cruel have it worse there. Greedy characters have to use Willpower to not swipe riches they were warned not to touch. That sort of thing. Maybe Willpower can get slight bonuses on poisons, but nothing too spectacular.
That, unfortunately, is something I'm not totally square on just yet. I'm imagining that depends on your skill to some degree, perhaps after a certain number of rounds of not using it, you start to regenerate them-- regaining DODGE as you're not under attack anymore and get your balance up, for example. PARRY will probably regenerate faster.
The trouble is, I actually have no idea what systems would be compatible. If you would like to assist in this endeavor, please feel free to PM me and we can talk on Skype.