I've noticed that a lot of BlackBerry newbies complain about the limits of the hub without really understanding its actual purpose. It was never meant to serve the purpose of redundancy - meaning that it is not designed to perform all functions of Twitter or Facebook or anything else that it houses. It's simply meant to provide a sort of portal to these apps so that you may quickly PEEK at an alert and decide if you want to respond from there WITHOUT HAVING TO OPEN the app and go right back to what you were working on.
There are too many people criticizing the hub for it not being what amounts to an unnecessary alternate method of opening an app.