I'm pretty sure everyone knew this ability would be lackluster the minute they said how it worked. It's all style and no substance.
Outside of its niche, it's a worse Earthly star and even in its niche, it's akin to spamming Medica just without the benefit of working with Temperance/PI.
The "wait for the raid tier" argument can shove it because if WHM's MP economy is still trash by then, we won't even see WHM in those fights to even try and make use of the damn thing anyways.