So I've been having this same conversation/argument with one of my players for about two weeks now regarding two metamagics that, depending on interpreation, have similar if not the same effects.
The metamagic sphere Control Space states:
"This ability allows a wizard to choose which people within the area of effect of one of this offensive spells are actually targets of it, even with those spells that explicitly state otherwise, such as Fire Ball or Dome of Destruction…" (Arcana Exxet pg 27 for the rest of the description, but that's what's related to the issue)
Mystic Accuracy states:
"Basic Level (One Sphere): The wizard's Attack spells gain the Precision trait. There is no effect on Area Attack spells." There's no problem here, called shots on non-AoE attack spells are at half penalty. The next sphere is the sticking point.
"Arcane Level (Two Spheres): Area Attack spells also gain the Precision trait, and the wizard may designate specific targets in each spell's area." Specifically the second part is where my interpretation differs from that of my friend.
I read that as meaning that the sphere not only allows AoEs to have the Precision trait but not every target in the AoE has to have a called shot applied to them nor do all of the called shots have to be at the same region or sub-target, but all bodies within the effected area are still targetted regardless. His interpretation is that it also grants the same effect as Control Space.
I doubt there's some kind of official ruling somewhere, so what do you all think?