At PIH we’ve been adding new functionality that we feel require icons that are not included in FontAwesome. Upgrading FontAwesome (https://issues.openmrs.org/browse/RA-1387) will help, but even then I’m not sure we will have all the icons we need. Many common icons (fingerprint, awareness ribbons etc…) have been requested for years and still not added.
I’m wondering if anyone else is feeling similarly restricted by FontAwesome and are using or thought of using additional resources? There are many other icon resources (e.g. https://thenounproject.com/ and others) that have more than we might ever need.