In terms of the events, we will be introducing many more PvP events on Neltharion. The reason why we initially stopped offering them is lack of interest of players in them.
As for promotions, these suggestions have been forwarded to the project leader for consideration. If anything comes up from it, there will be appropriate announcements.
In terms of development, we all know that having this many expansions is too much of a toll on our team. The Burning Crusade expansion was only possible due to versatility of our core. Otherwise, we would not be able to host such an expansions and since Cataclysm is very different in terms of emulation (actually similar but in terms of underlying systems it's different) it's hard to push content to it.
The reason why Tol Barad is still not out and the fact we have no ETA is because the staff member in charge of it is not able to finish it. Unless, we are able to find other staff members with enough time, it's put on a shelf.