Yeah on the only real problem being speed(*). Larry thinks speed is the #1 impediment to broad interest and many of us agree. Unfortunately we also agree that the core hackers should focus on creating the right design, getting it working, making it work right, speeding it up -- in that order. So Rakudo has sped up a lot this year (I hope to report on that in January), but most realization of known potential optimizations is yet to come (I anticipate a lot more speed up again in 2014). Btw, if anyone reading this enjoys optimizing, it doesn't require C chops, but just Perl (mostly NQP, a small subset of P6).
(*) Yeah on hyperbole and broken promises. I think I'm generally avoiding them but I grant both that there's been a lot of this over P6's history and that, perhaps because of this history, folk routinely manage to interpret my statements as being hyperbole and/or promises.