Gowther's brainwashing of Guila
In the original it was so he could understand love. Here, it'll either be quite wrong in turning her into un utter slave, or just making her as bad as Diane is with Meliodas. Meliodas freeing Margaret from Vivian's control
He'll hear her voice and be “Oh christ there's three of her!” and he's actually trying to kill her, but instead kills the creature keeping her bound from rebelling.- Well, those weren't his exact words, but otherwise confirmed.
Elizabeth's healing power
Her healing power is when she sounds like a proper woman and not like the nails on chalkboard voice she has. When Hawk goes tiny...
His voice will end up getting a case of Vocal Dissonance for his size. Original Hawk's voice got more high pitched while this one will end up with a baritone that makes even Ban question his sexuality. Meliodas' memories
In his memories, he will finally realize that Elizabeth is his love reincarnated and promptly go demon because he realzied that her voice is because the heavens were that desperate to stop them from falling in love and says like "SO ITS YOUR FAULT THAT I HAD TO PUT UP WITH THAT VOICE!?"