My first comment was a kneejerk reaction, which I admitted to another anon when I went more into why I'm upset.

Donna is a really huge sore spot for me and after having finally resigned myself to her never being brought back since RTD left as showrunner, seeing a character who was so much like her and who could have been a new favorite of mine screwed up so badly by Moffat's obsession with crazy plotlines and Timey Wimey really pissed me off. He's managed to screw up every character in his run as showrunner who I either already loved or thought I would really love.

(And this is from someone who adores the work he's done on Sherlock. Moffat + free reign just doesn't equal good things, I guess.)