These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Alternative Character Interpretation: At least one reviewer has pointed out that Snowdrop's teacher is kind of a jerk. She singles out one of her students and when he fails to find the answer it makes him look stupid. Similarly, Snowdrop not having a partner is partly her fault as well, because she should have known that Snowdrop would have had trouble with such a large project and assigned her a partner to help.
Snowdrop's apparent uselessness, as told by the other ponies is not much in evidence, leading some to speculate that her "uselessness" is a result of her own inaction and she's complaining about being lazy.
Tear Jerker: Of nigh-memetic proportions, the ending in particular. A considerable portion of the comments on Snowdrop consist of people stating they actually cried upon watching it.
Unfortunate Implications: Let's see here, the only apparent blind pony we see is fragile, constantly bullied, has low self-worth, and only remembered because she did something unique. Not helped by the fact that when she isn't something to be pitied, Snow Drop is portrayed as Inspirationally Disadvantaged so that she can prove herself. Nice job creators, you've managed to give a disabled character both extremes of a bad stereotype.
What an Idiot: Snowdrop going out in the middle of a winter blizzard alone, after her teacher specifically says it's the worst of the season.
The Woobie: Snowdrop. So much so, she ends up giving Fluttershy a run for her money.