And personally i think when they get introduced, they should have pro and con, who make the abilities mostly neutral but give the players maybe some kind of charakter.
This is the reason why I like this suggestion. Players will be more unique and personal if these things would be implemented!
But... I think it's very hard to implement these things. How would you give all the existing players these abilities?
When I run into an invisible spider web, I instantly become a kung-fu master.