I'm surprised at how much dislike there is for Thaumcraft here. I've played it since TC2 and I think it's one of the best content mods out there. Largely due to the fact that it's got some of the best in-game help (the thaumnomicon) out of any mod that I've played. Taint is scary early on, but as long as you build your house far enough that it isn't chunkloaded, you should be fine. Hungry nodes, though... those are BS.
Is there a quest that sells awakened draconium? Or are those reward-bag only? In 0.1.0 I had bought the sword and a few other bits, but after loading up 0.1.1 that page of my book was in a slightly broken state. The awakened draconium armor quest was marked as complete (and unavailable, despite it being repeatable) so I loaded up an edit book and unmarked it. I figured that one was just due to something like quest IDs changing between versions. I see quests to buy awakened armor, tools, and weapons. But those quests require the awakened cores, which are crafted from awakened ingots, and I don't see a way to buy awakened ingots.
Edit: Some thoughts on the new auto exchange methods:
For the tiered exchange rates, it might make sense to use TE's induction smelter instead of the alloy furnace. The induction smelter has 2 input and 2 outputs, so you could have for example 5 coins + diamond token yield 1 voucher + diamond token, and eliminate the need to periodically submit the quest manually to restock tokens.
If you are still doing major overhauls to the system, consider stacking things in powers of 9. Instead of 20 coins == 1 coin bag, consider something like 81 coins == 9 coin stacks == 1 coin bag. That way they can be done in the crafting grid rather than requiring intermediate exchange quests. That is, unless you're phasing out coin bags and such entirely.