It seems the official documentation is missing some SimVars from FSX that are still working in MSFS:
AI TRAFFIC ASSIGNED RUNWAY
AI TRAFFIC ASSIGNED PARKING
AI TRAFFIC ETD
AI TRAFFIC ETA
AI TRAFFIC FROMAIRPORT
AI TRAFFIC TOAIRPORT
Basically all SimVars for "AI TRAFFIC ...." are mising in the current documentation, the once above have been tested by us and are returning correct values.
Do you plan to update the documentation or are the SimVars deprecated and are getting replaced by new once?