Is your feature request related to a problem? Please describe.
As title states, neither the primal crusher nor a chameleon pickaxe enchanted with impact will harvest GT ores(or actually any tileentity) with their 3x3 mining effect.
Describe the solution you'd like
From what I can tell, this behavior is due to the "harvestBlock" method in thaumcraft/common/lib/utils/BlockUtils (though I'm not entirely fluent in java, and it's obfuscated, so correct me if I'm wrong), which I believe just returns false for tile entities (but is also responsible for the "item collection" effect these tools have), and forbidden magic just calls the same method from TC.