I'll give my criticisms on the starting cutscene.
Right off the bat, I dislike the immediate mention of drugs by Vinyl, this is still the My Little Pony universe, if you wan't to talk about such things then just hint at them, don't be so blunt.
At first I thought it was Octavia speaking, since her sprite was the first to move. Make it more obvious who is speaking, maybe Vinyl angling her head or something.
Personally, I don't like shipping, but it isn't inherently wrong. I would have much preferred if you had just called them good friends and let the audience draw conclusions, it doesn't need a kiss.
Vinyl drawings things on Trixie's dragon is kinda unnecessary imo, and it's a weird transition from her just having been talking to Octavia. Maybe it'd be better for her to just say she's sorry for spreading gossip about her or something.
I also don't like when Berry swears at Trixie and the other way around, just use light swears or words like horseapples, come on, they're still ponies even if they're murderous and infected.