Yes, you’re right. Asobo should better explain their Database objects and eight characters out of limited ASCII are also only a minimum. And also yes, today surely 5 Characters is not enough (and we are in modern times, where Gigabytes dont care to much for the FS…). My invention was only, not to point it too much on ICAO or IATA. I think, they also massive conflict to asean Airports e.g. in China or in Japan (I was there and they like very much to use their own characters & languages). I think, ICAO Standardization is not really the World of Today…
Good luck for your Zendesk Ticket. Hopefully it may help worldwide to bring us more together 