I know the Contact Hub and Me Tile have Facebook integration but does the Me Tile get messages and updates from my Facebook account?
That's how I do it. I have the Facebook app installed but seldom use it. I am not sure what is meant by unreliable. I always get my messages in a timely manner. My favorite part is I have a family group with live tile pinned to my start screen. When someone in the group posts to Facebook it shows on the live tile. I can open the hub and go strength to that persons profile to read what has been posted. I don't have to weed through 200 posts from others to get to the information I want.
If the other person is invisible or appearing offline no messages come through. Also, the chat doesn't stay connected all the time. It disconnects numerous times in a day. Rarely there are people who get spot on instant notifications. There is delay of around 5-6 minutes for all such notifications including ME tile, whatsapp like IM apps. I think earlier WPC had a thread or news article comparing this unreliable notifications side by side with iPhone.