With the new info about psykers:
New Warhammer 40,000 – Psychic Phase – Warhammer CommunitySome new options opens up, while others got closed.
I'm guessing snake eyes (double 1's) and double 6's will mean POTW.
I hope POTW will be simple either lose a wound, or lose a mastery level and a power meaning ML 1 psykers loose their ability to cast psychic powers for the rest of the game.
DTW may just be a minus to the cast roll, say -1 for each mastery level in the deniers favor, psychic hood could be a deduct D6 but add the casters ML.
As for the powers I think we will see
WC1 = 5+ (83%)
WC2 = 6+ (72%)
WC3 = 7+ (58%)
WC4 = 8+ (42%)
or something similar.
I just hope you can buy or pick your powers, from a small list of the faction specific ones, we don't need to choose from 50+ powers available to everyone. A farseer would rarely have learned how to cast foot of Gork, nor summon chaos daemons.
A weirdboy predicting the future would certainly be weird, but knowing where the grotblast will land probably only makes the weirdboy laugh, at seemingly nothing, rather than have any practical use. "Tree grotts cwushk 2 off dem big blu 'umies, grotts are funny when dere bellies go splat n dere tiny bones go krunch"