Last stable update for x86_64 landed with quite a delay, breaking a bit the “frequency” trend …
Maybe you have a broken/outdated mirror? Try instead: sudo pacman-mirrors -f5 && sudo pacman -Syyu
On the other hand, you can also check the announcements for unstable and testing branches:
That way you will be informed about the progress and what is still on fixing phase, before pushed to stable. Also, you can always switch branches and provide more feedback.