MC is still cunning. He just have different mindset and priorities.
This story is kinda the reverse of the usual reincarnation trope
Which is: pushover/selfless/goody two shoes/white moonlight MV who were bullied/betrayed die and when they were given a second chance.. they plotted a revenge and in the process they become a selfish/self centered, shady cunning, conniving main character (blackened).
In this story the opposite happened.. MC used to be a selfish, ambitious, cunning, shady, conniving character who aim for personal glory/achievements.. but his life ended in tragedy.
So this second time he choose different route. He's still cunning but his goal have changed. MC no longer care about personal gain/achievement, he doesn't hesitate to sacrific himself for his main goal: eradicate the seeds of Black Swan.
idgaf i dislike goodie two shoes mfs, I like them a little shady and conniving!!