It would be useful for modpack making if it was possible to change the list of ores that the deep core miner can output.
Also: is it possible to change the research entries? Not just add new ones but edit existing ones or remove one entirely.

The ores are generated depending on the chunk. So all ores are scanned and then their ratio is determined. You can use the API (or crafttweaker for previous versions) to edit researches. Its also possible to edit the research.json in the jar