I have collected a list of toolbar related bugs and regressions (the list is not complete):
As you can see there are many usability issues caused by the removal of the byline viewlet and the intrinsic cluttering of the toolbar.
To solve some of these issues some people want to clutter the toolbar even more, others want to remove it and others want to bring back some old functionality into the Plone UI.
I think is time to sit down, think a little bit, have a good discussion about the topic and come back with a better toolbar.