Finished the vault mission on Nessus and was then able to do a few strikes, including the one that was in the beta/demo. Great fun. I know I'm a bit of a fanboy but I think this game's phenomenal... something for everyone and it builds upon the first. It's not perfect, nor is it anything super revolutionary but it's a damn good time. Should only get better as more people pick it up and new events and activities get added. Hopefully I'm around to do some of the nightfall strikes and if there's more of those six-player fire team missions that would be cool too.
The new ghost voice is a little tiresome though... like trying wayyy too hard to be funny. I liked PD better but new guy works I suppose.