Well far as this chapter.
spoilers:
According to spoilers, Scott undoes Emma's mind-wipe that erased mutants from humans' minds. Which made her sacrifice & trump meaningless. Nemesis gloats to Emma that her relationship with Scott is dead. Then when everyone returns from Age of X, Scott goes & kisses Jean with Emma upset & watching them in the background. |
end of spoilers
Far as Emma's character, her fans feel she just came off as evil & cowardly. She couldn't handle anything that was thrown at her, arguably threw mutants under the bus to save herself, had to rely on Mystique to fix a mess, and even sarcastically says that dragging everyone down with her is more fun that going alone.
So basically for many fans, she came off as evil psycho Emma. Rather than more complex, mutant-rights Emma. And some felt her pining away for Scott and acting as if they never broke up made her look pathetic.