Twitter is restoring the old blocking scheme.

Good news.

As a side note, this would be a good opportunity for Twitter to look at a mute feature, which roughly would be the new blocking behavior, just implemented alongside the block feature that forces an unfollow. Third-party apps have been doing this for a long time; it seems to make sense to give people the ability to curate their feeds more carefully if someone is being loud (like live-tweeting sports, for instance).