OMG I think I have seen Su Luxia plan and it's per~fect~
Su Luxia giving the divorce to her annoying husband, specially so close after a scandal, will give her the white halo of poor suffering woman who finally dropped the millstone that was ruining her and her family.
The asshat will be WTF and now hopelessly in love with his former meal ticket, and his attempts to reconcile with his ex will be rebuffed with "But I let you go with the one that you ~*~truly love~*~, why would you want to take back this poor useless ugly unfashionable woman~"
And Bai Ting was right on that the Chinese feudal society may look bad at Su Luxia for divorcing her husband, but she hasn't realized that she herself has the worst part on the clusterfuck. As the homewrecker, her reputation is making acquaintances with the fishes in the Marianas Trench, the Marshall will drop her like a hot potato (because his real love interest is Original Goods!Su Luxia's BFF! He's not gonna ruin that!), and her original target and the only one guy that on that society could take her now not only hates now her but also knows what kind of woman she really is. At this point her only options left seems to be streetwalking prostitution (which she seems to be too haughty to take) or suicide Her ruin is absolute and she was too dumb to realize or prevent it.
Probably my suppositions will be jossed next chapter, but Luxia's move is magistral.
(disclaimer: I have not seen the raw, this is my enthusiastic theorizing)