That one is a bit odd. I can see events and environments changing; however, actual people changing? That's a bit harder to explain with alternate universes. I mean, sure if we saw our alternate selves with those powers. But the fact some people are now manifesting those powers?
Granted, alternate universes are only recently theorized as likely and more than plausible; so, we hardly have any real knowledge about what would happen should these universes cross.