A friend of mine recently said something to me which I am somewhat believing might be the case. It was a comparison to the coach from The Waterboy, Beaulieu who takes the sole credit from Klein, if you're familiar then the playbook was taken, or handed to Yoshi (Beaulieu) which had a lot of Tanaka's (Klein) future ideas, plans and so on, though this playbook (unlike Kleins) was incomplete and full of holes it had enough to turn it around and the holes were filled in as a team. My friend believed that Tanaka never got to carry out HIS play, and it was taken and handed to another before he could.
While it's not completely likely... I do have some belief in parts of it being the case.
Now the playbook has been done, the coach has to do 100% new plays... and, well, we have HW. I cannot be, and am not, the only person that noticed a drop in quality and direction, originality and output or what have you from ARR to HW.