Breadcrumbs are out of scope for this plugin. You can definitely create a plugin to create breadcrumbs from the menu structure, but I'm not 100% sure how you would go about that sorry. You'd start with the active item and use the .getParent (or similar method) to work your way up to the parent item in the next set.
I'm not sure how to go about updating the page title either. But as you're already on that page (in most scenarios) whose title you want to change, you don't need anything from this plugin to achieve that goal.
I think. Let me know if I've misunderstood what you're trying to achieve :)