Jetstar have always had hiring policies inconsistent with logical expectations. Right now one needs "an ATPL, at least 1500 hours and all ATPL subjects." Someone at Jetstar doesn't know or care what an ATPL actually is...
However, in spite of that I'd like to know exactly who is being held back by the new rules.
Jetstar isn't doing much hiring right now, and their shortlist of applicants must be full of multi-crew glass-cockpit experienced pilots. According to their website, these people are preferred, and there are lots and lots of ATPL holders in this cohort.
I wonder really how many people are being held back by not having an ATPL yet? Not held back from applying - lots of people no doubt - but held back from actually getting a job. Very few right now I think.