Is this not a rip-off of Aokiji's DF.
Aokiji's powers steal energy immediately ( Hie = chill not ice )
freezing things instantly, where Monet's power deals with gradual temperature drops ( That is what she did to Luffy which nearly rendered unconscious )
Then after that, VP found a way to enhance objects with DF abilities and combined that with his cybernetic and mechanical genius, thus the Pacifista program was born.
There have been hints at more advanced Pacifista, continuing the DF program to enhance them would worth exploring, just look at Kuma.
More and more I'm leaning towards all DFs being man made. We need to see something aching to records of their first appearance in history because the ancient civilizations could have had a hand in creating them.