In line with vanilla Minecraft, breaking an ore block should drop a raw material.
For those who haven't been keeping up with vanilla, the only ore block that still drops itself in ore form is Ancient Debris (source of Netherite). Everything else will drop a material such as "raw iron", "raw copper", "raw gold", etc.
The same should be implemented with respect to IndustrialCraft2 ores (lead, tin, silver, uranium).
~Max