Thank you for the suggestion!
Let me make sure I understand what you mean: For example, a certain character who pauses twice as long after each sentence?
This unfortunately would not work with the current code, since it makes use of the "config.say_menu_text_filter" callback, which purely filters dialogue text and has no idea who is saying it.
Therefore, I don't think such granular control would be possible without some ugly workarounds that would defy the simplicity of this plugin, but feel free to correct me if I got this wrong!