I hope they add some more in future content releases. It's just a little disappointing, with all the combinations of armor pieces, colors, and emblems a player can choose to customize their Spartan with, the only stances I see people use is Assassin and Last Stand. Assassin Last Stand. Last Stand Assassin. Recruit. Last Stand Assassin. Including myself.
You have some people rockin' Assault and maybe a weapon mastery stance, but those numbers are minuscule reatively.
I mean, I'd like to see a stance where a Spartan is Dual wielding some weapons (even though you can't) or holding a grenade. I'm sure it couldn't be that far a stretch of the imagination to think more may be released within the near future.