During the beta stage of the game, it had a much better dialogue interface, with much bigger artwork and more intelligent usage of screen space. For example: Can it be reimplemented? I feel that it gives much better representation of a character, especially with these full body shots.
Until we have a better idea of how to manipulate how the dialog boxes are drawn we're going to have to wait. I can see it being possible if we can hook into the drawing function for dialogues and drawn one ourselves but at the moment at least I don't know if it's possible nor do I know much about how SV renders things.