Probably a lot better. She would have been associated more with Obama and probably looked at more favorably. Additionally, this would have meant that there was no email scandal and thus a majority of her negative coverage wouldn't have existed.
Less blame for Benghazi too.
I mean, Republicans would still be trying to throw anything they could at Hillary and hoping it stuck. And they'd even dig back to the 90s to do so if necessary. But we know the emails/Benghazi attacks wouldn't have been the same, at least, and in an election that close any change could make a decisive difference.