The only real issue with Matt Ward's work, in my opinion, is Codex: Grey Knights. The Necron "bromance*" and the ultramarine thing are blown out of proportion, and the Grey Knights codex was only a problem from a fluff perspective (since it was pretty clearly written with 6th edition in mind, and worked relatively fine there).


*Seriously. Two forces, neither knowing that much about each other, cease hostilities to combat a known, highly dangerous threat, and then decide to depart under a truce. Woop-de-doo.