Guild Wars 2

I like having differing armor options and storylines based on our choice of allegiance. While the pact means we’re working towards a common goal, I’d like to see more stuff given to our initial choices.

Maybe new missions, sneaking around as the Order, or finding new texts with the Priory, getting new loot and mastering our parts in our respective allegiances.

I agree. It would be great if our allegiances carried on into the Xpac. I mean they are all part of the Pact still and I’m sure they all maintain their different approaches. The only thing that has changed is the big bad dragon we are fighting.
Maybe some kind of Elite Vigil/Priory/Order armour? Something you can only get after completing your faction’s role in HoT?

Well mastery as far as I’ve seen provides abilities, mastery is also account bound so the having character specific ranks (order selection is character based of course) seems odd. Granted I agree with the core sentiment, having access to Order specific content would be a nice addition. Potentially they might even have some type of reputation system, which allows you to do order mission and gain access to unique rewards the higher your reputation.
However I’m not sure ANet would produce 3 separate streams of content when they could produce a single stream that’s 3 times as long.

Three streams has the advantage of replayability in a game where you expect people to reach the head of a stream more than once .