No this CC does not use, nor will it ever use the so called 'Stance Dance'
Btw, i suggest you update to the latest version, and if you have.. Then please upload a log.
If this is a LazyRaider/RaidBot targeted CC, then I highly suggest you implement stance-dancing. (If you play Arms in any serious aspect of the game, you should be stance dancing. Period.)
Special note; (and yes, a tad off-topic and somewhat advert, but mostly for you guys to check the code and steal whatever you decide to steal), I'll be committing the new Arms instance rotation to Singular soon. It includes proper stance-dancing, CD usage, as well as some other.... tricks.
Average DPS on my 397 war is roughly 72k on Madness, 46k on Ultrax. (Turning off stance-dancing, drops that DPS down to 66k/41k respectively. However, the ability to turn stance-dancing off, is no longer available as its a pure DPS loss no matter how you look at it)
Lastly; you should be holding off on CS/OP/Slam if MS is about to come off CD (especially holding off Slam due to the swing timer reset). Check for the 2/4pc T13 and adjust your rotation accordingly. (Eg; 2pc T13, you should be using Inner Rage on CD and spamming HS/Cleave [whichever makes more sense at the time]. 4pc T13, you can try playing with the CS priority.)
Also (and correct me if I'm wrong, as I haven't looked through all the code), you should be using Battle/Comm Shout whenever you have less than 30 rage (and no more than 60), and Berserker Rage basically on CD. Free rage is always a good thing.
Ok, looking through the code even more... I see you guys love to use your RunMacroText stuff, for no real reason. Not only does RunMacroText assume the user is on an English client, it also has to abide by Blizzard's macro rules (which most of the time, HB's API does far better, and faster, as we skip the entire Lua engine in WoW)
Rotation wise; NEVER SPAM EXECUTE TO 5 STACKS. Ever. Replace Slam with Execute and continue with your normal rotation. MS/CS/Execute (OP if its going to cause more damage than Execute)