I think the turning point was Chris Young leaving, that really lowered the technical level of everything they published
Chris does have a youtube channel now that has some okay content but the best stuff is like a lot of the peak Chefsteps stuff: rehashed fat duck recipes. It’s a shame Heston blumenthal seems to have stopped making as much around 2014-15 because his books and tv content were truly excellent and most of the modern “haute cuisine” stuff goes right back to him. More recently it appears he had manic depression, was pushing himself far too hard, and finally got treatment. I hope he is doing well. His contributions to the culinary world are tremendous and imo under appreciated.