Michael Martinez 
I adore #PengXiaoRan as an actress but the reviews of #LoveAndCrown on MyDramaList (not to mention the average rating of 6.5) lead me to not want to watch the show. Of the reviews I've read, everyone seems to almost universally blame the writer.
Of the period/costume dramas she's done, the only other one I'm not interested in is #GoodbyeMyPrincess. While the show got an average 8.2 rating on MyDramaList, I've read the spoilers and I just hate sad endings (so, yeah, I've spoiled it for you - but the title kind of gives it away).