The flying units get a big, fat "meh..." from me. The commander customization is kind of cool but nothing spectacular for gameplay. The multi-planet campaign mode is also somewhat cool but I will reserve final judgment until I see it in action.
*Cringes at the history of being swamped by mutalisks in Starcraft before I got air units up*
I liked DoW without Air units. Gave it alot more emphasis on what makes a good map with good terrain to fight around. With Air units in the mix, so much for that. Damn Base Rapers

Don't get me wrong, I loved DoW DC and the rest of the races, but these additions of Dark Eldar and Sisters of Battle make think one thought - WEAK!
Even though you can't play as the Sisters of Battle (yet they showed them in the intro - wtf) I'm guessing it'll be a carbon copy of Space Marines style of play. And the Dark Eldar don't get much different feel than just a hybrid of Chaos/Eldar. I would have to agree with the over all "Meh" impression. Nothing new or exciting,
Next expansion please.