Oh wow this seems like a cool game!
Okay... So here is the list of things I've done today... Each hero have now 5th skill and here how it looks like full skill list for each hero: New skill can be learned at level 7, but they can be used max 5 times through whole game play, however you can refill charges with side activities (wich will be implemented soon).
Next what was updated it's the skills formulas themselves, instead adding whole pool of exp directly to skill damage you gain for skills special perk.
Read more at my board: http://soulrender.myartsonline.com/viewtopic.php?f=6&t=3