Is it a good idea to give psykers the psyker aptitude (via the package) ?
They could also get it in the AAT.
If the package grants it...wouldnt it be an too easy way to get cheap willpower advances mechanically ?
I know that the GM has to allow it and being a psyker has other consequences etc etc...
But still - mechanically, just getting this aptitude is easily worth the 300 XP for the psyker package.