I can only speculate, but the article alludes to establishing permanent communication with the moon’s backside:
> A satellite or spacecraft in a halo orbit [around L2] can be constantly in Earth’s sight and can therefore maintain communication between astronauts on the far side of the moon and control rooms back home.
China currently has a relay satellite at the Earth-Moon L2 for exactly this reason, they're going to launch a mission to land on the back side of the moon.
> A satellite or spacecraft in a halo orbit [around L2] can be constantly in Earth’s sight and can therefore maintain communication between astronauts on the far side of the moon and control rooms back home.