I'm not sure if this is the right place to ask or seek clarification, but do these class get the first ability, AND an ability of their choice?
Viewing post in Greater Secrets - Supply Drop comments
As intended, it's just the starting ability, since they're on par with other abilities. I'm not against giving them an extra choice since I know a predetermined starting ability can make it feel like you're lacking in customizability, but I'd suggest giving playbooks that don't have a predetermined starting ability an extra choice as well in that case, so that everyone's on the same level.