You actually touched on a golden point there:
There's a major issue with the way things were and they way they are now, let alone how they will be. Many things needed to change, and some finally are. Sprint no longer costing TP (hasn't cost TP in PvP since 3.2, and it didn't affect balance at all), cross class skills being reworked into role-specific skills (I have high hopes AND concerns for this one, but we'll soon see), so why then should Cleric Stance not be considered for change?
Slightly related: when almost all DPS jobs and even tanks offer some kind of party utility/support, why then are the jobs primarily designed to do it - BRD and MCH - penalized for doing so once they have to render said support to the party? Healers can and should DPS where and when they can, but why suddenly penalize your ability to heal? This is the part that needs rethinking more than anything.
Some might say if they remove it, healing will be too easy. Okay then, increase the demand for the role's main function. Nothing really hits hard right now, which does leave healers with a lot of downtime that many fill with DPSing. Fine. But if - crazy as it sounds - you had to perform your primary role and the challenge wasn't flipping a switch to dampen your ability to do so, but instead learning where and when to properly do it AND maintain performance of your primary role as effectively as possible, is it so easy then? How would this be any different from learning how/when to cast and move as a caster, or position/pre-position and execute proper rotation as a physical DPS? Which by the way, both cases healers aren't exempt from either.
I'd be in favor of a rework at the least, but I'd rather see it go, and instead see more complexity introduced via the challenge of the content.
As a final thought, I'd say there's a bigger issue when The Man himself doesn't even like the skill.