Marvel's idea for AvX is simple. The X-Men are too secluded and not fully integrated with the MU, let's kick them off their high horse and force them into being part of the Avengers! They want to make the entire MU more cohesive and integrated in such a way that it will not be strange to see Moon Knight fighting alongside Gambit or something like that. The problem is they're doing it wrong, they're forcing the alliance with a crossover that has gotten negative response by most fans. Enter Chris Claremont.
The fabled X-Scribe had been doing for ages what they're trying to do now. Claremont brought the X-World and the Fantastic Four closer, not only during his "much-maligned" run in FF v3 but even before that. When Khan and his minions tried to invade the Earth, who did Claremont use? The Avengers. And let us not forget, when the Avengers wanted to get rid of Carol Cheeseburger what did Claremont do? Well he created ROGUE.
There is only one writer that knows the MU and understands how it works.
Let us use this thread to reminisce about different displays of an integrated X-Men in the MU with Claremont at the helm.