Well, So as mentioned a few weeks back I was working on a Bric to inject OpenGraph and Twitter tags in the header. The problem is, although it works, using Javascript has an issue where FB reads the meta tags before the opengraph ones are added, Which sucks lol.
I am not much of a coder, so I dont have a solution lol. Maybe @Norm can build something into Blocs? Most of the tags were just pulling from the SEO short codes 
FYI @Flashman