It is sometimes frustrating to type a message in the chat in-game only to have it immediately pushed out of the box by someone spamming voice commands. If voice commands had their own, smaller message log below the chat box this wouldn't be a problem. For example, Rising Storm 2 has two separate chat logs that work like this:
Written team damage in the chat box is very annoying aswell, especially when somebody gets hit by fire. every point of damage is written down separately and Poof! gone is the message. I stopped using it completely, apart from "gg" at the end of the round. Literally no point in using it.