Sorry I didn't understand about the SP: you mean that it's possible that steals a float amount, like 0.8? I can force it to be an int() and be minimum 1 then

The chances might have made some battles easier, but the thing is that I believe some of them were too hard in Nightmare mode before (at the point that was almost impossible to beat them). So even if some battles are easier it's OK, the important I think are the main plot battles (vampires, personal quests). In general if the battles are shorter is better I think. But I can always tweak the single battles of course.
Regarding the interest skill, like also other talents that give an item, I was thinking to allow it ONCE per battle. So you get one item, and then the next time the other effect still works (paralyze/slow/etc) but no more item given. I need to update the texts too, but I think this was a needed change for all those skills.