I believe it is inevitable that best practice will not be understood until a couple years after Perl6 is out.
After all, this was no different after the transition from Perl4 to Perl5. I'm sure that implementing Exporter using inheritance seemed like an absolutely great idea at the time, f.ex. — and that's just the most obvious and visible example of goofy stuff in the core modules. They all indicate how the top ranks of Perl4 hackers tried to adapt to the newfangled stuff in Perl5.
Doubtless, we will produce just as much nonsensical gibberish in Perl6 before we start getting an unencumbered feel for the new language.
Makeshifts last the longest.