No no and no. Breaking changes are not ok, not even slightly! It's not acceptable after an alpha release, It's especially not acceptable after a beta release.

No no and no. Breaking changes are not ok, not even slightly! It's not acceptable after an alpha release, It's especially not acceptable after a beta release. And it is offensive against developers to have breaking changes from the first release candidate and onwards. Even for major releases, breaking changes is a VERY BAD thing. But sometimes it is unfortunately unavoidable.