Thanks for the file and for using Dropbox. As well for updating your own question!
Never hesitate to ask. Many people might have a benefit from the question here.
If I get it correctly, the Cage Deformer, the Mesh, the Weighting tag, the Display-tag, the Stop-tag, the Cluster object, including the required Null, all of that serves one purpose: to stretch the object on the end of the animation. Eight objects.
If that is so, then a single FFD cage with a total of eight points and PLA animated can replace all of that.
As a side note, the Fracture-tasta object is not really needed, so far I can see.
Is that answering your question?
Enjoy your weekend.