I found the posts on FB and I don't trust them by a single bit. The guy said to ask him questions and didn't answer a single one. Other members state that he was very pessimistic before too. I also think, that reviewers doesn't receive a book beforehand. They always look like they opened it for the second or the third time. Well, the reviews may be recorded way before hand too.
In general, his words doesn't make sense. Removing wary fighters from skinks and giving nothing in return and leaving them at 70 pts doesn't make sense. It is just incompetence. And the new BT already looks like they put a lot of effort in it. It may be not a top competitive one, but I am assured that it will be a good battletome and fun to play. In the end, how can you nerf something like a Temple guard? They had 2 attacks, 3+, 3+ -1 1. You can scare no one in current AoS meta. How to nerf them? Remove attack? Rend? Make 4+ to-hit or to-wound? Why? It would be absolutely stupid. The only thing that is close to nerfing so far is Oldblood's Spear, but it is just stayed the same, actually. Worse rend but better to-hit. One may argue that EotG got nerfed, because it will have only 3 results now, but how much exactly we needed? We wanted mortal wounds or summon anyway. Healing was situational, but now it has a way longer range. When you bastis are 10 wounds and stegies are 12, it can be really helpful. So I won't call it a nerf right now. So won't trust the guy until I literally see what he said in the new BT.