I would love to see an assault flier like the Storm Raven and either a fighter gunship or some sort of space wolf only AA.
I can see Rune Priests getting hit with the nerf stick but I hope not made unusable. Their psychic defense was second only to Eldar's runes...and we see what happened to those (cough*useless*cough). Im sure they wil get limited from 24" anti psychic to 6" or something dumb.
Ive never had a huge issue with Long Fangs as in the end, they are as easy to kill as 1 Hell Drake =P, though if they are brought in line with Space Marines as far as cost goes, that is fine by me.
Grey Hunters will get an increase, or lose their ccw, or be able to buy it for 1-2pts per model. Im fine with that.
Id like to see Mark of Wulfen be something cool, perhaps able to take 0-1 unit of all Wulfen dudes, kinda like Possessed.
And I hope Acute Senses is changed as it is mostly useless.