Not even less then ideal timeslots can keep pony down!

Edit: 14 awesome things from the RE Commentary.
http://www.equestriadaily.com/2014/10/t ... stria.htmlThe original Equestria Girls was not originally intended to be a franchise and a sequel was not originally planned.
The opening of the movie (pre-credits) occurs chronologically with the ending of the original Equestria Girls. We then jump 6 months ahead before the Sirens appear at Canterlot High.
The directors wanted to make the instrument-playing as accurate as possible.
Unlike the show, Depth of Field can be used much better with humans and so Rainbow Rocks introduces that element throughout various songs and scenes.
It was intentional NOT to use the My Little Pony theme song in Rainbow Rocks. This gives the Equestria Girls franchise its own identity.
William Anderson wanted the orchestration for Rainbow Rocks to be dynamic and epic at the same time. The example used was the build up when we go from Canterlot High to Ponyville, the music will give you chills.
The book in which Twilight learns about the Sirens is a callback to the first episode where Twilight learns about Nightmare Moon.
Some scenes were designed to be long because they wanted to "milk" the fact. The example used is when Twilight returns to Canterlot High and Sunset is offering her hand, Twilight is hesitant about her help. This was done on purpose.
Another scene that was "milked" was the scene in the gymnasium when the girls try to defeat the Sirens by using the "Magic of Friendship" but fail.
There's a lot of characters "not having it" in the movie. You see a lot of this from the Cutie Mark Crusaders, Luna, Celestia and various other characters.
The kitchen scene with Twilight and Sunset was a last minute addition that plays such a key role to building a trust between them.