A lot of that seems like speculation. We all knew that FF was dying a slow death so it's cancellation was no surprise. It's like how people were saying that Marvel was trying to push the Inhumans to replace the X-Men, when official statements plus their future roadmap indicates anything but that.
Edit: about Wolverine, he plus other X-Men lines sold quite well for a time being, but his solo/X-Men books don't garner much attention despite having fairly good writing. Hence why the character gets 'killed off', much like what other publishers do to get eyeballs on the pages.
Edit: about Wolverine, he plus other X-Men lines sold quite well for a time being, but his solo/X-Men books don't garner much attention despite having fairly good writing. Hence why the character gets 'killed off', much like what other publishers do to get eyeballs on the pages.