The main problem we see with Australia right now is that as you've probably noticed due to the random drops, our current datacenter really sucks, to be blunt. It's extremely difficult to find a good datacenter in Australia, and we're obviously still looking for a better one, but pretty much any datacenter in Australia is ridiculously expensive as well - as an example, 25 AU servers (1 node) cost roughly same as 125-150 US servers (5-6 nodes).
You state above that regardless of cost, "all my arguments are completely valid". Whether or not this is true, the cost is one factor limiting us. While not the main factor, we'd rather not put that much money into the type of service that we've been getting from our current Australian datacenter recently, so as I said, we're looking for a better one before we invest in more AU servers.