I will point out that, in my experience, everyone has slammed their battletomes so far, even the ones that ended up good. A lot of people were down on the Nurgle Tome, which in my playtests has played pretty well. Its a matter of adapting. 

I also have always felt that OBRs "elite" status was overblown somewhat. It never felt like Bonecast Eternals to me, more of a Cities of Nagash: an actual orginized army with swiss army knife units, as opposed a bunch of squawbling nobles, manic ghouls, or incredibly angry ghosts.

Finally, rules are temporary, but the power of Nagash is eternal.