and what I mean by that a group that works and releases content while waiting for major patches?

They can do like -

Side Quest Dungeons

Side Quest Stories that the main team does not have time for (there was a lot of cut content or unrealized ideas that didn't make it during each major expansion, and especially during Stormblood).

Build more PVP zones or new PVP Modes

Misc. Stuff
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I think its clear to me the main team is on this one train they cannot get out of concerning the MSQ and their other tasks, and I know people been complaining about 4-5 month window releases.

They really need a side-team.

Least from my observation over the years.