Not me, I haven't read the "what if".
I only mentioned the "cocoon" thing because it's the first retcon when they bring back Jean for X-Factor.
It doesn't matter anyway because in the latest, current retcons, the PF is a separate entity and that what Blackphoenix complained about, saying he wanted the Phoenix to be just Jean power like it was originaly. And I pointed that, originaly, it was not just Jean power...
Except for the cocoon-stuff, which I mentioned as the first recton, everything else that I mentioned is directly from the DFS. Com'on, I even gave you the exact references, check by yourself ! Here you go again, Uncanny X-Men #137, last episode of the original Dark Phoenix Saga :
uxm137.jpg
Oh and something that I find ironic : If you think that Phoenix was only the power of Jean, that mean that in a few seconds she learned molecular manipulation (changing her costume), operate an alien stargate, open her own stargate and fix an energy matrix that contain a n-galaxy among other things... In that case, O5 Jean is taking her bloody time to learn to use TP ! How can people complain she is learning too fast ! ROTFL