And yes Phoenix was retcon that those actions were not Jean Grey but Phoenix for we can't sell comics if Phoenix is a genocidal murder who killed billions when she eat stars. It was a top down decision that came out of the comics and wrote it. I know that is what technically happened but I am dispensing of the pretense. You are smart enought to realize two contradictory things, that was Jean, except technically it was not Jean, it was just a Thanos clone, or Doombot, or Phoenix avatar
But she is not an interesting character when she is with Cyclops and their arms are interlocked, or lusting after Wolverine, and so on. Let Jean Grey stories be Jean Grey stories and her as her own woman. Aka stop putting Jean Grey in some form of relationship triangle, whether romantic or somehow being the mediator of two other people. Let her be her own thing.