Arch install script could be better. The dedicated /home partition is a pain if you don't know what you're doing (I don't know what I'm doing). The encryption thing also breaks a lot of things.
If you don't partition correctly and don't allocate enough storage for /home and your root for usr/share, you might run out of space quickly. I put like most of of my storage in /home and soon enough I ran out of space as I was downloading heavier files from the aur. Completely ran out of space on the usr/share partition.