The DMA destroyed one station, one populated planet, and one colony that was evacuated before it struck. A sector is 20 LY across.
If they were to use the power, they could rebuild kweijan and all of the damage to planets and creatures in season four.
The finale established that the technology could reanimate a dead body, but couldn't restore minds or personalities. There's also no indication that it could build a planet or reanimate bodies that were crushed in an artificial singularity.