Its quite shocking, god knows what the facebook team at Microsoft are doing. There is not a problem with how the app looks, i prefer this facebooks app and feel, it just needs all the basic features and some fine tuning. Its shocking to think there has been no new features added to the app since v2.5 which was released on 24th May 2012.
I have a strange feeling that WP7 customers may get a major update too as v2.7 and then 2.8 were the last versions on WP7 and v4.0 was released to WP8 so what happened to v3.0? maybe v3.0 for WP7 customers coming and a major update for WP8 customers shortly... i just hope for the sake of the platform.