Think CEFCOM was version 1; wikipedia says 2006 (and rebranded CJOC in 2012).
Canadian Expeditionary Force Command - Wikipedia
Pre-CEFCOM was before my time, but from my limited CJOC experience they were right in our shorts for really detailed things, and completely useless for getting support on high level things where you needed big picture parts to get moving.
If the only thing you bring to the table is additional layers of approval, hard to understand the purpose of their existence. But maybe they are doing all kinds of things up the chain in a black box fashion that aren't obvious at the deployed unit level. to keep SJS and other folks like that happy.
Weird though, because when you are doing the same stuff not under CJOC with ships, SS still manages to figure out how to arrange events with local embassies, coordinate logistics/customs with other countries, etc. Maybe makes more sense for Army or airforce, if you are just sending a platoon or some planes, but might just be another empire.