If you haven't seen it yet the FAQ for the grey knights really changed them. A lot. And from my first impressions really made them bland.
All of the unique powers, hallocaust, warp quake, are now gone completely. All that's left are some utility powers. Except for the grandmaster that can now take anything.
So are the new gks just space marines with power weapons and a crap load of psyker dice?
What are your thoughts on all this?