Oh this... oh my GOD, this.
Not gonna roll on a hate train, but this is the best descriptor I've seen concerning Double Rainboom's problems. That, and pacing issues out the ASS.
I've seen some people on Derpibooru claiming stupid shit like that Magical Mystery Cure was less coherent and well written than Rainboom. I equate this to butthurt and bullshit. Double Rainboom had 30 minutes. 30... MINUTES...
to put together a plot and take us on a journey, and it squandered that. It got eight minutes more than any one episode of the show ever did, and we got THIS for a story: Twilight makes an ability enhancing potion. Rainbow drinks it, because of course she does. Rainbow can fly with awesome now. Antics ensue. Rainbow causes a Double Rainboom and destroys Ponyville, before leaping dimensions into Townsville for a surprise crossover. Antics ensue. Rainbow gets rescued by Pinkie Pie.
Oh yeah, clearly
better than Episode 3/13, which in 22 minutes contained seven musical numbers, created and resolved a great conflict, brought light to Celestia's plans and purposes for Twilight throughout the entire series, fulfilled Twilight's destiny to rule Equestria alongside her mentor and reconciled to the emotional resonance and significance of the event. It managed to invoke a true emotional response and was paced well enough not to feel especially rushed given the breadth of the story it told.
Rainboom's story is anorexic. It fiddle-farts around so much with filler and padding that it ends up taking the vast majority of time in the thing. It plods though, slooooooowly explaining what the potion might do, and adding overlong comedy bits with fan-favorite characters and appealing to memes. Things like that are generally welcome, but not at the expense of THIS much screen time. Things like Derpy trying to eat a muffin and getting distracted by flowerpots hitting her head
. Why did it need to be this long? She's hit by TWO of them
in a good THIRTY SECOND sequence before one finally smashes her muffin and she stares at it forlornly
. A good editor could trim the entire production by half its length and have lost almost nothing, just by cutting the filler and keeping it succinct and punchy.
It just reeks of lost potential. If it were advertised correctly, and a decent writer and editor had been brought in, you could really have had something. As it is, it's a sundae made almost entirely of sprinkles.