Reverting disk aliases?

It is not. In fact, most subsystem maintainers pay very little attention to such arguments when the kernel change being proposed is not a hack, is reasonably contained, and has no long-term consequences worth of notice.

However, a new ABI that lots of people disagree with _is_ a long-term consequence worth of notice, and getting it in with so many outstanding NACKs doesn't make it any more palatable.