Absolutely, but then, the majority of DC's characters have. The essence of the character has been lost, replaced with the hollow bare bones of her previous continuity. She's still related to Superman, but it's a Superman we have no connection to, who dies in the very issue he's introduced. She's still friends with the Huntress, but that relationship was largely unknown to the modern fan base, as that particular Huntress hadn't been seen in 25 years. The Justice Society of America, the team which defined her, no longer exists. All of her relationships with the super hero community are gone. No aspect of her previous continuity is relevant any longer. So, we're left with a character who made her non-costumed debut in the Mr. Terrific series, as the title character's sex buddy. Since virtually no one was reading Mr. Terrific, a title which, by all accounts was just terrible, her debut goes, largely, unnoticed. The character generated some buzz when the World's Finest title was announced, but that was fueled by a desire to see the fan favorite Power Girl make her debut in the "new" 52. That didn't happen, as that Power Girl didn't actually come back. Instead DC offered up a Power Girl who carried the trappings of the original in her make-up, but none of the heart. Each subsequent appearance merely serves as a reminder to the fan base that this character isn't Power Girl, and thus there's no support for her.
this basically sums it up. I still have love for her though i hope she gets a great writer and lets her start interacting with the rest of the new 52 to get back her appeal.