Would save my sanity
Because blend ores are bullshit.
I cannot retrieve manganese nor from stiratite nor from jivolite, but suddenly I can if I mix them up. Did it magically appear? Or is it a mix of non-iron ores (cobalt, aluminium, titanium etc.) is started being called manganese?
An ore should contain what it contains. What is contained should be retrievable. No more, no less.
And no casual nuclear fusion/fission on the fly.
At least an option to not have that
I'm talking about ALL blend ores, not just the Ferrous one

The Ferrous/Cupric etc style blended ores are an angels concept, which i am hesitant to remove, especially considering some of the recent changes to that, and the new sorting recipes i have introduced.
I do understand where you are coming from though.