In the context of the MCU (setting aside the mind control, which they seem to have dropped) it seems like she's supposed to have matter manipulation...
Batman: The Adventure Continues also seemed to indicate Dini and Burnett couldn't quite make it work together either, although part of that comic was...
I don't know if it's because of the logic of the world they're in or whether her powers are being upgraded somehow but they're definitely treating it...
I thought J'onn was pretty good myself. Probably one of his better animated depictions, and I thought he fit organically into Clark's story here :). ...