Well please forgive me for being such a Dark Eldar fan (it is that decadence that turns me on). I have found some changes of Dark Eldar as of 1.62.52: the Archon becomes a single attachable hero unit (but the tooltip still claims that he can reinforce incubus - bug?), and Mandrake becomes a single non-reinforceable unit. Well... so be it. The Incubus Retinue now buildable as a secondary hero is pretty powerful though.
A little gripe about the Sisters of Battle: they are kind of... neglected. They don't have completely new units, in contrast to the huge additions to the other races like SM and Chaos.
Looking forward to your updates!