If you couldn’t come up with the real materials, it seemed that the Chief Lord wouldn’t believe in you.
Lu Li hadn’t found the materials in an hour and a half, nor did he have the Alchemy level required to make this Moonlight Grass Potion.
Yes, the Moonlight Grass Potion would fix the Worgen’s problems.
After giving them a Moonlight Grass Potion, these crazed Worgens could overcome their inner evil and transform themselves once again into humans, while still retaining the strength of the Worgen Transformation.
They would be free to use that ability with the wisdom that came with being a human.
In fact, this was the start of the Worgen race quest which could be completed by a player of any race, as long as they were from the Alliance. Once they fully completed this quest line, they could transform into a Worgen.
The strength increase wasn’t that great, as balance still needed to be maintained, but many players fancied the idea of such a transformation.