Fix the death knight starting area.
Add a multiboxing feature.
The whole point of WotLK is the death knights and being able to create and play one. The death knight starting area has all kinds of defects. It needs to be fixed.
It would be a lot of fun being able to summon your other toons into the game and play them together (multibox). In fact, just as soon as I am able to do this on my private server I will stop playing retail or public WoW.
So, to the person that created Trinitycore, please fix the death knight starting area and add the ability for a player to summon his other toons into the game and play them together. I know that this can be done because it was done on the Mangos core and the multiboxing feature works great.