Charts - helpful if links are found on a (division?) website? Usually I just google _ _ _ _ charts
A very simple test [or quiz ] on sign-up like the atsimtest for S1. Provide docomeents for them to prepare. At least this ensures they will have a rough idea of what is a clearance, different types of approaches, how to talk to atc etc
Support for the new Europe frequencies if possible to implement
One has an option to view the callsign of an atc frequency in the pilot client?
well when I fly to new places I don't know if it's Control, Center or Radar, so this cld probably help