Originally Posted by
RachelGrey
So you keep suggesting that Rachel should just leave the 616 universe and return to her own! She can't change the past in her world, every time she tries to go back in time on her planet she ends up in 616, it's like some kind of safe guard in her cronoskimming that prevents her from changing anything that would interfere in her own existence.
Laterally the 616 universe is about 20 years behind the 811 universe because time is running different between the two. When Rachel goes to 811 she is still 20 years in the future plus the time she has been in 616. So when she returns to 811 everyone is still dead, the Sentinels may not be killing anyone anymore but they are still running the show because they were just reprogrammed to take care of all living things now. The population is still massively decimated for both Mutants and Humans in 811.
Going back to her world she can't bring anyone back, she can't bring Jean and Scott or anyone back, she is unable to change the past in her own world. She doesn't want to live there because she hates living in a world ruled over by Sentinels, even if they are programmed to be nice now.