See there it is again. My issue isn't with any of the changes. I use "minority" in quotes because females make up half of the planet, and white males are nowhere near a "majority".
My problem is that this is marketing or management interfering with characters because they want it to appear like they are more diverse. The idea to make Thor female (give the powers to Angela) isn't organic to the story it's an attempt to make it look like they have more females in higher positions. Making Sam Cap doesn't add anything to the story, but it isn't a detraction from it, it's simply a marketing ploy to show that they care for the black characters they dropped when Quesada took over. And announcing it on The View and Colbert isn't an attempt to get more readers it's an attempt to assuage the people that are likely to criticize them for not doing it.
Giving female and ethnic characters more important roles in the story is a good thing, giving them temporary positions that used to belong to other characters doesn't solve the problem though. In fact it makes it worse because when they change back the lack of importance will be all that much more noticeable.
It's trying to address the problem without making any long term changes to address the problem.