I liked it and think it should return. I remember making a topic about this during E3 asking the people who went if the Fatality Stance was back in Deception and I never got an answer.
I honestly NEVER used it it. I can see where it would help but after doing fatalities in the previous games where distance mattered, you had to hold block if tapping up, then some required you to hit more than one button at the exact same time all in like 3 seconds...After doing that it's really a breeze to do the DA fatalities, even without the Fatality stance. It makes no difference to me either way.