The plot wasn't simmering though, it was completely ignored. Simmering plots points are referenced in some way or another be it subtely or overtly even if a front burner story currently is not about said plot point. That did not happen in Rucka's run, it was as if the revelations never happened, and to me that can't happen. To me this was akin to if DW revealed Superman was dying and then sitting on it for almost a year with no reference at all. It was a bad move. They didn't have to force the entire story on Rucka, but they should have at least demanded it be acknowledged in some form or another. There was every opportunity for him to tell the story he pitched and was hired to tell while at the same time not letting key developments heading into Rebirth be forgotten.
Again though I'm not blaming that on the problems with this run. That was a separate mistake, but a mistake all the same imo.