Other Grand Company Ranks when?

[Jeeqbit]

It's part of the log jam. They want new gc content associated with those ranks but they hardly ever get time to work on it because of all the other stuff they give a higher priority. So there's no time frame for implementation, just somewhere on the to do list.

This exactly. From their point of view it's not as simple as letting you have another rank. That rank has to mean something. If you are to be a captain you must have a squadron to command. So if you are a commander I am going to guess you need to command multiple squadrons.