"...Also felt it should have been Clint. I think we all did. I won't tag MikeMcMann just in case he didn't see it..."
The Universe is secure in Stage 2 because the Top Avenger has survived. I love that he went on a John Wick, dog, type run through crime families after they killed his family.
But in all seriousness, it was clear Widow always felt she owed Cint some major debt. That she felt he saved her in the past and gave her this new life. It was then required that for the proper end of her character for her to sacrifice herself to now save him and return him to his wife and kids.
Glad you loved the movie Anung.