I liked the Darkover series rather better than anything else she's done. The continuity in the series is quite tangled. I read some as they were printed, some as I found them in used paperback. But then Bradley started revisiting earlier time periods. As I recall later novels tended to go to earlier time periods in the fictional Darkover history, whereas I read much more in the Terran colony period. And as I recall there was a certain expansion
of storylines and characters and themes that some might call retcons.
The upshot I think is that internal continuity is irrelevant. I got bored with the convolutedness and repetition and thematic fuzziness of the book to book storylines and quit after maybe eight, ten novels. I would read each whenever it becomes available, ignoring publishing dates and internal continuity.