It's also become clear to me that there simply isn't a single "quality of writing" metric. Write quality is made up of dozens of factors (prose, character development, world building, plot development, grammar, uniqueness, pacing, dialog, etc). Each person balances those factors differently, and trying to squash them into a single metric is just bad communication.
Personally, I love sci-fi with good world building; As long as the book has great world building, a decent plot, and a unique concept; I'm usually willing to give it the label of "average writing" despite the bad prose, clunky pacing, and cookie-cutter character development. But other people immediately turned off by the negative factors (especially bad prose).