I agree.
I'd like an option to have an icon appear above every character to show which characters have new dialogue (similarly to how party members have an "!" above them when they have special dialogue events).
Something like...
"!" [red]
This character has new dialogue and main quest information (information starting or furthering quests).
"!" [green]
This character has new dialogue and side quest information.
"!" [blue]
This character has new dialogue but no quest information.
"!" [grey]
This character has quest dialogue but no new dialogue.
"+" [red/green] (combines with "!")
This character requires an item for a quest, and the party/camp already has it.
"+" [grey]
This character requires an item for a quest, but the party/camp doesn't have it yet.
"..." [blue]
This character has new dialogue, but no dialogue choices.
"..." [grey]
This character has no new dialogue, and no dialogue choices.