Although I doubt that’s the reason; I figured it out a while ago.
It’s a shame that this won’t help Natalia, just as the fact that the first and second circle druid spells aren’t very useful among themselves. And for level eight, it’s only the first circle.
I think it’s much more effective to max out the rogue’s abilities to whatever level you want, and then switch to a fighter or mage when everything is maxed out.