DISCLAIMER: Arch Linux is not a beginner friendly distribution, and this is not a recommendation or good practice.
I know how to use pacman -S. I have yet to experience a Discover related issue after months of use.
Wait, I am supposed to care about .pacnew files?
Anyway, so far all I found there is new optional dependencies.
I rather wonder what happens when manual intervention is needed, like when JDK started being in conflict with JRE.