By virtue of the fact that Atlassian chose not to list in Australia they have sent a message to government. Turnbull appears to be the kind of prime minister who could make Australia more tech-friendly, so fingers crossed.
The best option for a rising tech company in Australia remains, unfortunately, to purchase outright a flailing listed mining company and invert, a la 1999. This is where the "scammy" feel of listed tech companies comes from.