Patience, or time is something MS does not have in this segment.
You have to remember that I liked the integrated part, all the way to the point where it worked. When I needed the app anyway it started to be frustrating. At the end when the FB beta was laggy but livable I was only using the app anymore.
There are so many examples here, when someone commented at a status and you couldnt like it, no support for groups (we use a lot of secret groups for work projects), the chat part; no group chat, no pictures, when FB changed their end so that people see what device you were on from etc etc...
People nomally want things to work, period. They dont want to be wondering "why I cant like the comments on statuses,on my old iPhone this never was a problem" and so on.
HAving something so deeply integrated in to the OS cant be updated fast enough, this was proven. FB changes something and WP has a broken FB, or if not broken lagging features for a very long time.
I feel your pain, but this just dont make sense.