Also, as a side note, I gotta say I'm a little disappointed to see so little activity in the Necron section! What happened to everyone?
You're right, time to reboot my Necrons! I've been guilty of playing my Ultramarines with the new rules, but I think it's time to crack out the metal heads.
What this space!
In the mean time, I think Zahndrekh is a great character in this edition. Giving Tank Hunter to a unit makes them extremely dangerous now.
Being able to remove Stealth could be useful when removing something nasty.
He's also become somewhat defensive in some ways too, which is a plus points. He can remove Night Vision, Tank Hunters and all the rest from a single enemy unit. This means that Ravager or Hammerhead can no longer ignore night fighting!
However, Phased reinforcements could be useful to get a bunch of models on the table early too, though I doubt many people will make use of it really when you can role a 3+ to bring on units. Why put your army into a situation where it can turn up and get attacked before it manages to do anything?
Just deepstrike normally.