Holy Moly, that was some read.
Here's my two cents. I don't care how much you love or hate OR. Someone else should have that closing slot. Simple.
You can give me all her pros and cons all day long and how she is really popular right now and how she's been performing for x years and blah, blah, blah.
They are making a big deal out of this “50th Anniversary” and all that. If It's so big and important, they should have gone big. Much bigger than her. Allocated some extra budget etcetera to bring in one BIG headliner. Sacrifice some undercard names or something. Regardless of the genre, just someone bigger.
She shouldn't be there.*
*Shouldn't be the closing headliner