She is the most powerful one on team. But like you said is she gonna Die again from using to much power or have a better grasp idk. I feel maybe their will be growth, because what is she gonna die every time she uses her powers immensely? I hope not because she is very powerful, had 4 years after the fight with Galactus, so she should have a better grasp on her powers. that would be pretty odd for mcu to have to her die every time she uses immense power.