Soo, heaps of people doing book reviews, so its not hard to find the rules now.
I think these are the pick of the litter.
Howling Banshee Exarch Power - Disarming Strike - reducing the number of attacks is better than just being harder to hit.
Fire Dragon Exarch Power - Swift Step - the extra move distance will help to get within half range.
Dire Avengers Exarch Power - Avenging Strikes - Your going to take loses anyway.
Dark Reapers Exarch Power - Rapid Shot
Swooping Hawks Exarch Power - Herald of Victory - Heald is still the best option for freaky lists.
Striking Scorpions Exarch Power - Withdrawal - Situational, but I would be willing to give this a go, being able to fall back in the enemies turn could be awesome.
Shining Spears Exarch Power - Skilled Rider/Withdraw - I think the improved invul would be the way to go, but that might just be my bad rolling

- Withdrawl could be interesting as well.
Crimson Hunter Exarch Power - Hawkeye - better chance of hitting.
Warp Spider Exarch Power - Whim of Deceit - this could be devastating especially if you run multiple units.
Craftworld Attributes Combo's.
Most of the attributes are meh, as in, I would rather run Alaitoc, Ulthwe, or Iyanden, but the following combo's could tempt me.
Webway strike for each detachment combined with -1 AP for shuriken weapons.
Use this to get multiple GD bombs off, for less CP spend.
or
-1 AP for shuriken weapons and ignore cover. I think this is the better all round option.
So what in the new rules tickles your fancy?