Ok,
After looking over this issue very carefully, I have some questions regarding chaos minor psychic powers.
Do they follow the same rules as the "general" minor psychic powers?
I.E. they are only to be used with opponents permission.
Another thing is the wording for the minor powers say that they can make one roll on the minor power list but any duplicates can be rerolled.
How can you have duplicates of ONE roll?
The GW site is down and I can't go to the fAQ's to see if they corrected the wording.
One point I want to make is that the Slannesh power "siren" is totally abusable.
If the chaos player wants his Keeper of secrets to bypass the "Large target"rule he just buys a few minor psychic power rolls. rolls untill he gets Siren, and buys a warp talisman, and POOF his demon prince is untouchable!