Conq debuffed just as fast with as many bubbles before the revamp, fyi.
What revamp mostly did was making weapon damage stacks into permanent buffs, resulting in conq being able to burst from the start of a fight instead of having to wait for having stacked up stuff. If I were looking for revamp stuff to undo, I'd start there.
About the op, according to what you say it wouldn't fix anything in the case of the DT so is it really the thing to do ? Also, as pointed out, with a long cd on stance change, a soldier in frenzy is just like a barb but without the speed buffs and without the cc-resists/purges... you might as well remove the stances altogether
Like viroku, I would rather see other changes than cd of stance switching. At this point I sound like a broken record but nerfing the mobility of soldiers, who was buffed with energy revamp and anti-cc perks, while lack of mobility is supposed to be the soldier's weak point, is IMO a better way to go.