For lightning, anything that makes them more mobile and less required to stare at the action/buff bar.
Why isn't madness included since its dps is still terrible.
The funny part is that madness sorcs are already great 1 vs 1 duelers (one aspect of the game, I know...), but by extension, with 2.5, they'll have a larger dps output now that their DoTs cannot be cleansed. Sure this won't effect the spec much in the end, but it doesn't fix the intended problem that the madness spec had to begin with, ie. force cost issues and not enough burst. (especially for the assassin).