What If I Transmigrated as Wang Yuanji?

I recently rewatched The Advisors Alliance, and when I got to the later episodes of Growling Tiger, Roaring Dragon, I couldn't help feeling how much of a shame it was! Duoduo is so lovely, so why is Zhao'er so wicked? Why make Zhao'er fall for his sister-in-law? If I transmigrated as Wang Yuanji, could I bring Zhao'er back from the brink? Keep him from murdering the emperor and usurping the throne, raise Yan'er and You'er well, and stop the brothers from killing each other!

So, to indulge my own selfish wishes, I want to write a different version of Zhao'er. The drama doesn't spend much time on Zhao'er or his first wife, Wang Yuanji, but I love Tan Jianci's Sima Zhao far too much to see him turn evil. That's why I'm writing this story. I hope that in this fictional world, Zhao'er and Yuanji can live happy, peaceful lives and achieve everything they ever wished for. I hope to make up for the regrets, and for the Sima Jin dynasty to establish itself through loyalty, unite the realm, and spare the people a century of war. May no one have to suffer the fate of "enlisting at fifteen and only returning home at eighty" again. May the realm enjoy enlightened rule and lasting peace. Since the drama only goes as far as Sima Yi's death, I won't go into much detail about what comes afterward, but I will give a general account. The story will diverge greatly from history; I mean no disrespect. I just want to tell a little story that isn't such a shame.