Well... it already HAS an ore processor. Aura Cascade's "balance" is difficulty in mastering the system. So it's balanced like Steve's Factory Manager and ComputerCraft. Also I don't think there are any truly passive aura pumps, but it's not like you can't feed the basic one infinite charcoal.
Yup, that was sort of my point. It is balanced within itself, and is difficult to balance where it begins to interact with other mods, because of the way it is balanced. I'm not saying it's balance is bad, just hard to work with from the outside.
Setting up a simple aura loop feeding an "aura dynamo" to make power that is used to make charcoal to keep the loop running is trivial, thus making any kind of balance there difficult. (That is not to say you couldn't do something similar with the other dynamos, because you can, though with perhaps a little more work)
As far as the ore processing, yes it has its own, as does Thaumcraft, but they don't have the capability for x7 ingot output like Technomancys... and actually with the addition of another mod to the mix, might make it up to x9 output. The issue is trying to balance costs. There is no way to tie an amount of aura power back to a cost to make it. aura cascade doesn't work like that, by design, and while that is a great departure from what most mods do it makes things difficult. It's easy to say that processing an ore costs X number of Ignis, or Mana and tying that back to a "cost" to actually generate that "fuel". But the aura power is more similar to BloodMagic LP, where the amount you get has to do with the efficiency of your system and the care you put into designing it, and is largely independent from the amount of fuel used to generate it. an inefficient system may consume 30 coal to generate 10 aura power, while a very efficient one may consume 1 coal to generate 1000. That makes it very hard to balance against the other costs.
If we took it a step further and looked at the "fabricators" in Technomancy, the equivalent in aura cascade would be an RF Aura Pump. The fabricators are all sized out to be far more costly in RF to run than the output could be used to produce, to ensure that they can not be used to infinitely produce power or resources. But I'm not sure how you would do that for Aura, since the aura pumped is not directly proportional to the amount of aura power you could get out of it.