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Hmmmmm... not sure if you realised but you kind of lose the connections between the events. Currently it's roughly organised as: IAAF events, IOC events, other events. How about moving Universiade to the similar/related Olympics events, world records to the IAAF section (as they ratify them), and group the EAA comps with the Commonwealth Games as "others"?
The new 'Athletics World Cup' does not belong in this category. It's not organised by the IAAF and it's not an international championship event. It's essentially an invitational competition between a select few countries, dressed up to look more important than it really is. It's in the same category as the Decanation or Thorpe Cup; if those two competitions aren't listed here, then neither should the Athletics World Cup.