There is no suggestion of a nerf to reflective shield, the suggestion is that reactive damage such as thorns which are higher against fast hitting melee need to be toned down. Reflective shields are intrinsically balanced as they're based on damage dealt, so they're not part of the problem.
I haven't raided on my priest in 3.1 but I'm pretty sure I read a thread where somebody reported that shields popping simultaneously avoided the CD on mana return from rapture. If that's the case I'd definitely expect a fix to hit there, but a bugfix ain't a nerf!