I remember when I built my first pfsense. I just started adding every feature that looked cool and later realized that most of it I didn't need at home. Squid and clam av were among those that I found not very useful for my home scenarios. My clients were either windows which had far superior AV or linux systems which need no AV. So, I don't use those now.
There are scenarios where it is useful though. For me, I used it to control what my kids could see on the net.
Later when they reached their teen years I turned it off…