Altjack - DakkaDakka
CSM do get marks, even an undivided mark. Forgot the bonuses but they are fairly obvious. While the base CSM troop seems cheap, the leader is roughly 200 iirc so it's good to take some cultists.
Tyranid Warriors was the surprising kill team. 3-5 models only. Tyranid Alpha, regular Warrior, newborn Warrior essentially, and Tyranid gun-beast. Didn't see operatives yet.
Continuing with 3-5 kill teams, there's the Grey Knights. They only had 3 options available instead of 4 for obvious reasons. Can't remember right now what they were.
Since Eldar rules have been posted already, I'll only point out that the artillery is hilarious. A friend figured out that the model using it could hide behind cover and still fire the weapon without exposing themselves. Since the shot comes from the gun. Have to confirm it myself.
AM vet team doesn't get homeworld options. And with only 10 models max, it is an odd duck out. But they can buy carapace and hotshot lasguns so they can be surprisingly effective.
Harlequins have a kill team, their flip belts allow them to ignore fall damage. Start charging from tall buildings people.
I know someone mentioned it, but it was asked again. Spec operatives are hired on a per game basis. You use promethium caches to hire them, at the cost of one per. You can hire as many as you want in any combination, though I think some have limits.
I'm tired so I can't remember the other stuff I found. It looks good so far but like any GW game there are some glaring issues. Who knows how it'll shake out. I'm going to be playing a lot of games Sunday so I'll post my thoughts if anybody wants to hear them.
Edit: forgot to add Necrons. I couldn't read much but they did have a chosen Immortal as a leader.