A good thing, if it ever happens. As already happens in NZ (and Europe, and other ICAO countries), newbies will have to demonstrate competence in a multi-crew aircraft before getting an ATPL. Me, I got an ATPL despite never having flown anything bigger than a Seneca! And zero charter / RPT experience...
To reassure some posters here, if it's anything like NZ or the EU, the test contains almost exactly the same items as an employer's command endorsement check ride, with perhaps 5 minutes of extra boxes to tick and an extra form to complete at the end. At one regional in NZ, FO's get the test upon request during a scheduled cyclic check unless the company is deliberately holding them back. Common sense applies and the sky has not yet fallen.