Hmmh... Her value is love, peace, empathy, compassion, feminism and truth. Superman used to be truth, justice and american way, but he's more universal now. Diana's values are already progressive, even in the 40s, I don't know how else can you modernize her.
Actually, I see more instances where they have to make an effort to keep her from regressing. Like when she's depowered and made into a fashion designer, or when the artists decided to dress her in a thong and give her boob and butt pose, or that now he needs to be biologically related to a male.
The change they did recently is officially making her bi, giving her a girlfriend, and/or confirming that Amazons do indeed love each other that way, but it's more about confirming what people already suspect.