Losing your edge?

I think it can open you up to new possibilities. Those demons are probably holding you back as an actor ie: not reaching your full potential. Wouldn't you like to play "light" as well as "intense"?
You can always dig up those demons for certain roles if you need to!
I remember an acting teacher telling us once: "If you're using acting as therapy, then you're in the wrong business."
I can understand your worry about "losing your edge", but personally, I do not believe that will happen.
So purge those demons and enjoy your craft!