Feel free to stop responding to me anytime. Mutilate was designed to be 60 energy even in sod. Slaughter from the Shadows proves that point.
Blizzard has done a poor job with the class. That doesn’t mean mutilate at 40 energy is correct. It simply means they came up with a band aid they haven’t been willing to rip back off because doing so would require them to actually spend time on the class.
So yeah, mutilate will likely remain 40 energy because it gives them 1 less class to actually work on.