YMMV / Letters From A Disgruntled Friendship Student
Moral Event Horizon: Twilight has several moments where she crosses it. Although she probably first goes past it in “Dragonshy.” She seriously contemplated using Pinkie Pie as a suicide bomber to kill the dragon without her knowing. If either the bomb or the large amount drugs in Pinkie’s system failed to kill him, Twilight was willing to hand over Fluttershy to the dragon as a sacrifice to appease him. Luckily, by the time they reach the top of the mountain, Twilight is apparently too frustrated to remember any of this.
Ron the Death Eater: Twilight gets hit pretty hard with this, to say the least. Pretty much the point, really.
It's the Same, Now It Sucks!: While the fic is pretty funny at first read, the same repeated shticks for the cast has been used for over 100 chapters now (even more counting the bonus chapters), and the gimmick can wear thin.