Really happy to see this being added today.
There’s that joke “Is it my birthday?” Well yes, it was, Yesterday. So, thanks for this 
My only addendum that I’d like to see in the future is user_ids being added to this. Otherwise it’s still functionally identical to that other one. Not having to make secondary requests would be great, especially since the /chatters can return up to 1000 chatters- which can be another 10 requests (100 per user lookup).
However, Great work as always to the dev team.