Alright I'm walking into this review completely ignorant of anything pony. That said, this review did do its job in accurately describing, not only the plot of the episode, while, but also the idealism of the show in general and the differences that come up in the show overall. This allows me, as a third party observer to make my own comments on the content, rather than simply its presentation, which was my initial plan in this case.
My Little Pony is personally something that I never found interest in, this not meaning that I attack those who enjoy the show its simply just something I won't go out of my way to watch, however I do enjoy the fact that such mature commentary can go on, on something that is ultimately a children's show first above all else. To see that is impressive in its own right, and thus in my books, puts it near Avatar The Last Airbender, another show that felt mature beyond its initial target audience.
One can find worry about putting spectacle over substance though, it can be something to worry about, especially in something as major as a season finale, on the other hand, if the spectacle is only the primary focus in say, one or two episodes, one can reason that it might be the exception to the norm. Regardless, one could and should be wary that a show may begin to lean in that direction overall, thus spoiling what, for some, may be the primary allure of the show to begin with.
The review was crisp in its own theories and interpretations while also providing witty commentary and fun jokes, though maybe a little too reliant on TF2 jokes. This could be argued that the TF2 jokes were added because of some context in the show I missed and if that is the case, feel free to kick me in the junk if we should ever meet.
That said, while you clearly presented the plot of the episode, something needed in order to review the product, I also feel you went too far, explaining the entire episode away, eliminating any surprise that a new viewer would find in the plot of the show. As you mentioned in your own piece on the Showcase, the idea of a review is not to tell the person what happened, but instead provide a quick peek that may draw them into the show. This summary you presented could have ended with the princess appearing to be an impostor for example.
That really comes down to the only serious criticism I have for the work though, I enjoy the formatting style, if not a little too Pony-y[?] for me, the paragraphing is solid, the thesis presented and kept on point for the majority of the read and last but not least, the read remained engaging despite my disinterest in the subject.
Keep up the good work.