Greetings
I have looked a bit through since I (recently) begun to play but saw nothing like this:
the possibility to speak in the main tab (visible by everybody around) but to a specific person, with clicking on him, like for the emotes.
Like this, when in a crowded place, it would help to know who speak to who, and prevent to be too messy.
It would be useful in taverns for instance and would help for RP (fools could speak to objects and monsters etc.)