- Accidental Innuendo: The Bronies React video of this episode made a big deal about the image of the crystal shard entering the crystal heart. Toodles' reaction was to quote the refrain from "What What (In the Butt)" by Samwell.
- Author's Saving Throw: The fact Celestia and Luna are actually actively involved in dealing with the threat this time after being sidelined for nearly every previous one. And also get to show off a bit of power, since Rainbow Dash freezes up in a few moments of cloud busting while Celestia and Luna spend the entirety of the disaster in the eye of the storm keeping it held back as long as possible.
- Base-Breaking Character: Flurry Heart. Some fans deride her as annoying, overpowered, odd-looking, reminiscent of the criticisms of "Baby Cakes" (as well as comparisons to Poof, another criticized Goo Goo Godlike), and responsible for the Crystal Empire being in danger yet again. Other fans accept her as cute (especially in contrast to the Uncanny Valley designs of past baby Ponies), less overpowered than expected, and surprisingly tolerable. The fact that she's given a Power Limiter at the end also helps.
- Fanfic Fuel: Sunburst's time at Celestia's School for Gifted Unicorns.
- Hilarious in Hindsight: The fixing of the Crystal Heart was a major plot point in A Different Perspective which was 1.5 years before the Season 6 premiere.
- Narm: In the Previously On recap of the first part, when Twilight Sparkle points out that the storm is coming and the characters are all facing certain doom if they don't fix the Crystal Heart, there is a blatant use of the generic crowd gasp Stock Sound Effect of the ponies' reaction that actually wasn't there in the first place. DHX crew, writers, do you want us to take this seriously or not?
- One-Scene Wonder: Night Light and Twilight Velvet steal the show when they suddenly speak for the first time.
- Rescued from the Scrappy Heap: Many people have softened up on Starlight Glimmer following her plights through the episode, desperate to help Sunburst and the Crystal Empire after her previous actions and doing a nice job at pulling it off thanks to the others' advice of friendship, especially Spike.
- The Un-Twist: Sunburst lying about being a wizard is quite obvious to the audience.
- They Wasted a Perfectly Good Plot: Like Amending Fences before it, some fans felt the initial dynamic between Starlight and Sunburst would have been perfect to teach that not all old friendships can be rekindled.
- The Woobie: Sunburst. He turns out to have a case of Dream-Crushing Handicap regarding his magical ability — and worse, his immense magical knowledge makes him fully aware of it — so he ended up becoming overwhelmed and living an insecure, reclusive life. Fortunately, he's able to not only fix his social standing, but also put said knowledge to good use after all in the end.
YMMV / My Little Pony: Friendship Is Magic S6 E2 "The Crystalling – Part 2"