So, from these rules snapshots, it looks like Screamers are now probably the best unit in the game, and Flamers are not far behind.
Screamers: 29 pts, 2 wounds, 3 str 5 ap2 armourbane attacks, still jetbikes.
Flamers: 23 points (down from 35), 2 wounds (!!!!), still get the breath attack, but can also use warpfire (the attack that Horrors have) at BS4.
Bananas. Are daemons going to be the new Grey Knights?