I could see that being a problem on occasion. I'd at least like the crew to know when Captain chat is active (captain is talking or being talked to) so they don't start shouting "Turn Left! Turn Right! Argh, where are we going!? What's the other ship doing? Who are we aiming at? We need to go lower!" while the other captains are also shouting "Lets focus on the Pyra! I'm going to ram him! Hey, you're about to hit me! Get to point B, we'll head to point A, and that ship down there head to C. Let's all meet up on XXXXX. Where are you?"
And then one or the other getting upset when you don't respond to them fast enough.
With a good crew on each ship, they tend to know better than to shout over each other. It's like how the clans use skype/party/teamspeak/vent/etc to all talk to each other, even while being on different ships. In an ideal situation, they would know to use it only when they need to tell the other ship something, and not confuse it with the crew chat, in which they generally shout whatever occurs to them at that moment. Like "We need to go lower!" as your ship is already descending.