Of all people who have nothing to say, those who say nothing are the wisest.
i noticed there's an auto Wu-Feng in the variants section of the forum. i hope someone can give some feedback if this is good enough to warrant a purchase of Black Secret ;)
I gave it a try a few times, and even gave some feedback for improvement, but ultimately you just lack the cruelty of a human Wu Feng actively trying to ruin your day. Mostly just the timing and aiming of curses, the control of the demons, ... all of those are so much more evil with some creative intelligence behind them.
I'd say Black Secret is only good for people who have played a lot of Ghost Stories, and who want to play competitively instead of Co-Op. Solo play really gets no benefit from it.