Outside of that?
AJ as Red with an orange apple on her buckle. That's just odd.
Additionally, I think it would have been better to pull a KR Skull with the hat, and not have the hat actually be a part of the helmet, just something they wear on top of the helmet. It'd be more distinctive, having it's natural color, and bear less semblance to a crown/tiara.

On technicality, you could call her an extremely dark shade of any color because eventually they'd all hit black :lol

Well, I kind of followed how Gokaiger did it with the hat. As for the orange apple and the purple diamond, do you remember the elements of harmony?
http://fc07.deviantart.net/fs70/i/20...e1-d49wsmf.png

Good point. :lol

The Gokaigers have hats on there helmets? *Looks it up.* Good god your right.

Concerning the hat, the Gokaigers all shared it. Here, it's a unique trait to her.
And of all the ponies who would get a unique trait, it should be Twilight.

As for the elements, you have to remember that the ponies they were attached to were still their same color. Rarity was still white and AJ was still tan/orange. Here, it's not as clear because the white pony is now black and the "Leader" character in red isn't the main character of the show, but AJ, the normally orange pony.

Yeah, you've got a point there.

Acording to TV tropes Twilight is more of a 6th ranger. That name aplies to more than just Rangers.

That and Applejack is best pony.

Those them there are fightin' words, boy.

I kid, of course. It's just the opinion you're entitled to.

Yeah, of all the other ponies aside from Twilight, I imagine that Applejack would be the one to take command. She has the right attitude to rally the others behind her and to get them to cooperate. That and she's the most stable of the other five... well at least I think so.

That doesn't change the fact that Twilight is the protagonist we follow.

Except AJ clearly never got along with Rarity prior to Twilight and has a short temper with Fluttershy (This one could be accounted to her lack of sleep, though).
Not to mention she's stubborn and doesn't know when to cut her losses or ask for help.

Those traits are actually what i imagine in a Red Ranger. >.>