The description we got has me thinking. It involves disassembly and reassembly on molecular level, which makes it possibly one of the most OP semblances in the show. So far, she uses it to move really fast, which is kinda like using your laptop to prop up a table. Molecular reassembly opens so many possibilities, like shapeshifting, healing, ultimate crafting and so on. With enough aura, she could literally reshape the world. Even without the precise control and vast knowledge required for those uses (Yeah, it's Ruby we are talking about), it is a one-shot kill against pretty much anything - just grab something, disassemble and never reassemble it. Even Salem would take a while to come back from that. And if she develops it to subatomic level, she is a walking nuke.
Or it was just a bit of technobabble with no thought given to the wider implications...