I read through the doc, and I have to say, the amount of recordkeeping in this system seems a lot less hefty than on other FE systems I've seen, which is much appreciated. Simpler mechanics go a long way in making the system fun.
Unfortunately, I can't tell you too much about any balancing issues, but I do have a piece of advice. The doc itself is kinda hard to read through. When you do an information dump like this, any flavor text you can throw in does wonders, and I think the format needs some work to make it an easier read.
Other than that, though, I like what I see, and would be interested in throwing my hat in the ring for a game