Difference between a "fireteam" and a group of 12

This is not a gripe post, just an observation and a thought-exercise.

Fireteams, as I understand it, are typically 4-man teams. In Halo 5 you can have up to 12. This gets a little difficult to manage… unless you want to run it like a real military and somehow “enforce” a “radio silence” which, let’s face it, sounds crappy for a variety of reasons.

I wonder if there might be a way to arrange a large fireteam into three smaller sections for easier management in Warzone games using the UI. I am sure that it’s easy enough to do with service tags and coordination from your team, but that method makes a laundry list of assumptions (mostly commitment related) that aren’t really feasible most of the time. Being able to flag a fireteam member as being Alpha, Bravo, or Charlie in the lobby would be nice, so that you could switch from party to game chat and only have your sub-team’s channel on your speakers, while the fireteam leader could still talk to the leader of each sub-team.

Probably way too complicated for a video game to get into, but it’s neat to think about, being able to send callouts only to a group of people who know that it’s their role to deal with only the callouts they receive.

Would anybody else make use of something like this, or do you have a system in your Spartan Company for handling large teams? I’ve played with a few companies (not my own) who are just complete chaos, so it got me thinking about this.