Things already mentioned in the thread:
Overlapping domination no longer giving the overlapping damage boost.
Psi secondary being retuned to me more like the (substantially weaker) blaster version.
Even Castle's example showed a nerf for one of the two powers he chose, assuming permadom of course.
So basically, the folks who spent the considerable effort to get permadom are understandably worried it may be a net nerf. The folks who don't bother to get permadom are also less likely to read the boards, and they're the ones getting buffed.