It's 2014 now and the background pony jokes seem to be alive and well. While I've never found the joke's existence to hold a great deal of merit to begin with, it makes even less sense here and now than it did in 2012 when season 2 ended on a pretty low note for Applejack. During the course of the 26 episode season, she received all of maybe two episodes of focus; one in which she was, according to some of the more fatuous members of the fandom, "outshined" by Derpy. In the other episode, she really didn't learn anything new, and that only served to reinforce the common notion that she's an underdeveloped and "fully explored" character. BronyCurious' popular and oft-cited "Why Applejack Gets No Love" video definitely didn't do anything to help matters either. I have and still do see that video frequently presented into discussion about Applejack's popularity and treatment by the FiM writing team. I didn't agree with the video when it was published then, but by now it's just plain outdated. AJ has come a long way since season 2 and has proven that she doesn't need the excuse of a destiny or goal to be an engaging, deep, and multifaceted main character.
As I was saying though, it's 2014, we're nearing season 4's end, and the joke is nothing but a complete farce anymore. Seasons 3 and 4 have both been very kind to Applejack; giving her even more screen time and episodes of focus than that of even Twilight Sparkle. She was the only character to have a speaking role in every episode of season 3, and season 4 has had a very heavy hand of Applejack-centric episodes, even if she co-starred in most of them. We've seen so many new dimensions to Applejack's character this season, and I think that she's been absolutely fantastic all throughout. To call her a background pony in 2014 out of anything other than jest would display a great deal of ignorance, but I honestly think most bronies do use the term as lightly as possible, and not because they actually think badly of Applejack. You will find a few rotten apples in every bushel though.
As for the McDonalds toys and why the set has excluded AJ, I really can't answer that question, but I think it reflects the fact that she is among the less popular of the main characters and isn't seen as being as marketable to the powers that be. But even then, AJ would thrash Vinyl Scratch in a popularity contest on any given day, and seeing as these toys are aimed at an audience that probably pays little to no attention to background ponies like the DJ, I am baffled as to how Vinyl got into the set over a a much more recognizable, main character like AJ. I've always enjoyed the group dynamic of the Mane Six, and it's sad to see any one of them get shafted in any given toy set. In my mind, the toy line will always feel incomplete if it doesn't feature all of the main characters. Thankfully for me, I had no interest in getting any of these toys to begin with, and the lack of AJ all but makes it a done deal for me, and I am sure that enough little tikes will be disappointed with Applejack being MIA from their Happy Meal too. If so, let all of this be a lesson to Hasbro and Mickey D's to always include Applejack in the future.