Both and neither. My feelings about River have changed since she first appeared in Series 4. I had a strong dislike to the way she was written in that episode and felt like she was a Mary Sue, random character and just disliked her. But as her story played out over Series 5-6 with her final good-bye at the end of Series 7, she did grow on me and I liked her arc and the way her story ended.
My disappointment in her coming back is that it fells like a rehash, dragging out of a trope that had a decent ending. I don’t know the context that she is coming back in but I just feel like her story is over. This is not tied to my feelings as a shipper simply because I have accepted that Clara could be gone at the end of Series 9, it’s tied up in my feelings of wanting River’s story to stay over and moving on.
Thanks for the question, I hope I have not offended any River lovers out there!