For Single Lines, be able to add ancillary items to the single line such as SPD's (connected to panel schedule breaker).

Based on a parameter SPD (Yes/No) Perhaps you can automatically add a breaker in panel schedule and a symbol/notation on the single line family

Would be good to have a visible representation of a CT/meter on the single line families. I currently use a CT cabinets as a ElectroBim single line Panelboard and customize the tag.