Questions remain unanswered by Xero, analyst says.
In 2014 it processed more than $250B worth of transactions, 95m invoices.
The global investor has taken a 5.4% stake in Xero.
Drury says high-profile new hires will allay concerns about key North American market.
The Xero CEO, and one of his toughest critics, weigh in on Xero's $10m purchase of a US payroll company.
Deal could jumpstart slow growth in the key US market.
The Meeting Place of Intelligent Business