How about you, at the end of this chain in QA, what's your biggest struggle?

I think the fact that it touches everything means we need to test everything. And it's not just testing everything with bind culling, because when you find an issue on, say, the bind culling server, is it a bind culling issue? Sometimes you can't tell just from the symptoms of the issue alone. You go back to a regular server, you need to reproduce it there. So you're not just testing everything, you're testing everything twice, with it affecting things coming and going. These aren't tests you can usually do by yourself. You need two testers, preferably as many testers as you can get together. And we only have a finite amount, regardless of how many zombies I can... It's been a massive strain on our resources, getting everybody we need to be where we need to be, covering as many things as we can.