Originally Posted by
Risvertasashi
You might be thinking of Shadowflare. Which is still there, incidentally, though it wasn't always an oGCD ability.
As far as Art of War goes, it's a pretty decent ability. Instant and high potency. It is point blank, but so is Holy with its lower potency and cast time that holds you in place. Gravity is ranged, but again, lower potency and it has a cast time. All of the healer AOEs have tradeoffs, but free mobility & weaving, and the highest damage among healer AOEs certainly doesn't make AoW terrible.
Although the animation is less flashy than the others, so some might like it less for that.