Referring to things by name has been done in pfSense since day one.
It's a brilliant way to simplify both rule creation and reading.
pfSense calls these 'aliases' and they can be used in place of hostnames (which are re-resolved every few hours to keep them updated), IPs, CIDR ranges, ports, groups of ports, or even as a way to import a list of any of the supported types from a plain text file at a URL for filtering purposes, which again, is updated on a schedule to stay current.
For instance I have an alias to allow a specific set of external addresses to ICMP ping my home connection for monitoring purposes, on most routers this would require a rule for each IP, with aliases it's a single rule.
Very useful, and a feature I will certainly miss when I leave pfSense for Almond+ once the firmware is feature-complete, and of course when the UK units have actually shipped out. Hopefully it can be added!