No, none of it is useful. The people up in arms over emotes and class items are ridiculous. The only thing people should be upset about is how vague Bungie is being about the actual content of TTK. They're charging more than half of the original games price and it really doesn't look like there's half the original game's content there. But we wouldn't know because Bungie is too busy making smug comments to actually define the DLC outside of the most basic contents.