Goldens writing is good, I don't blame her for how the story went, that I blame on the one telling her how it will go, that being metzen and kosac.
For what its worth, she really made me care about what happened to Jaina at first, because it felt like well the mana bomb (yes, spoilers, durr), destroyed theramore and everyone she knew and loved in it, it wasn't until she came across the remains of kinndy, and tried to hold her even when she turned to ash in her hands, and Jaina just lost, it was at that moment Jaina was lost. Impacting, well I don't approve at all how the developers wanted to make Jaina into what she became, the way Golden wrote it was still powerful.