Q:
Molten Facility return
Follow the virtues of your heart
A:
No, not yet. Additionally, she is going to research the reactor in Province Metrica (it was a huge explosion) not the molten facility.
This will come as a fractal towards the end of the year. Molten Facility AND the Aetherblade dungeon will come back as fractals, too.
We can only hope that those additions to the fractal rotation means a huge, huge reward revamp for high level fractals.
Both molten facility and aetherblade retreat will be added as fractals when they finish making and release the new thaumanova reactor fractal. So it will be quite a few months before we see them ingame.