I was just looking through the example levels for the new version of JJ2+ (amazing work on the Angel Script feature, by the way), and I noticed Destruct Scenery which actually reappeared and still functioned properly.

If this is due to a generator on those events, then I think that may very well fix the one-time-only issue with the Reworder trick documented here.

EDIT: Just finished testing this, and apparently the changes in the new version of JJ2+ removes the one-time-only issue. However, it also forces the two-block animation to switch to the Destruct Scenery animation regardless of its current state once the Destruct Scenery events regenerate -- but the events can now be fired continuously with relatively consistent results. If the generator delay is carefully timed, then this could allow a slight variation on regenerating Destruct Scenery and related events when it comes to level design for multiplayer Races.