neat idea - but the execution.. first thought as a user is when I see that "+ follow ..." - I am going to think that is another "share this / add to any (privacy stealing, please promote us on third party begging buttons) - aside from my issues with that, my point is that I would have no idea there are cool powers in the "..." portion of the button.
I'd be annoyed if it covered up important info from the layout / design..

It would be better ux to have the button perhaps slip with a vertical separator to show that it's really three different buttons?

as a wordpress publisher however I think the best ux would be to put it in the admin bar and get it off the screen that way.. separate the functions..

reminds me of the hamburger menu debate to some degree.. useful functions hidden behind something non-descript - likely rarely used..

like the idea of more power / info available from the front end without having to right click view source... think the actual button itself is not as descriptive as it could be.. and more descriptive may make it too obtrusive for the bottom right of screen... so leads me back to admin bar might be better..

perhaps have the admin bar animate to highlight newly available info when on a page that can provide extra available details like "get this theme" - shown with a hover would get used on my end.