I dont want it removed but it could be way more interactive than it currently is.
I think an easy way to make it cool is if say you used it as a 20s buff and he just sorta acted as an after image, and it doubled your damage and resource generation of any skill you did.
I think its lame they keep overwriting it with skills as a way to update it for expansions, and I'm tired of seeing "Enhanced Living Shadow" traits in general.