When I look at the sharebar I am missing two services.
1) Like button from Facebook
In the sharing option you can choose to show the official buttons, and this shows me a 'like' button. However, it has the functionality of the deprecated share button.
You can still configure it to show the share/send button next to the like button, see https://developers.facebook.com/docs/reference/plugins/like/.
The power of functionality of the like button:
the Like button improves clickthrough rates by allowing users to connect with one click, and by allowing them to see which of their friends have already connected.
Why is this missing in the sharebar?
2) +1 button from Google, again here you are using the wrong 'official button'. You are using the +1 button, but it has the functionality of the share button: https://developers.google.com/+/web/share/. Using the option of your plugin does not register a +1 at all...
Why is this option missing in the sharebar?