It's worth noting that there have been some issues w/ Facebook deprioritizing posts that use secondary publishing services in their algorithm, esp. since they offer debugging tools and scheduling options for pages themselves. I'd want to see if they've found a way around that kind of issue.

All of this gets very annoyingly complicated to keep up with - I do it for the law school where I work and we use a more limited free Buffer account and native analytics w/ Twitter/G+/LinkedIn b/c it does better w/ open graph content once we've optimized using Yoast.