I doubt they'd be "lenient" as such... They are also well known for being s l o w in replying.
However, there are only (hahaha...
) 4 ATPL exams to do in Oz. But they aren't a walkover, but with your 767 time it should be a bit more straight forward.
You'll more than likely need to do a CPL bridging exam (you'll laugh, it'll be mainly on pistons...) and the IR theory paper. (Not so easy...)
The IR flight test is no joke. You'll be expected to present the examiner up to date charts (either Jepps or DAPS) and you'll be expected to know your legal requirements WRT to the IR. NDB approaches are tested, a fail on that item = a fail on the IR. (That was the case 10 years ago)
Enjoy