I think her inclusion in primetime last night was a nod to the establishment. I thought her speech was the weakest of the three (Tim Scott's was probably the best, and Donald Trump Jr did a good job of serving the red meat and torching Biden). Nikki Haley didn't do a bad job mind you, but her speech was literally one of those paint by numbers "Republican" speeches that any establishment Republican from Jeb Bush to Mitt Romney could have given (we really aren't racist, we like immigrants, we are kind and compassionate conservatives, etc).
I think "Parsley" is a good description, you don't love it, you don't hate it, you probably wouldn't even miss it if it was gone, but it's just kind of there....