Not seeing this as being Arch Linux specific as I am sure other distros will be updating Perl as well. Though how they deal with this upgrade very well could be specific to their developers.
Florian Pritz wrote:
[1] https://mailman.archlinux.org/pipermail/arch-dev-public/2014-June/026359.html
URL: https://www.archlinux.org/news/perl-updated-to-520/