The phrase "massive reorganization" means a significant or huge restructuring of something, like a company or system, often involving major changes in its structure, operations, or organization. Full definition
In recent decades, much research on these topics has raised the questions of «tipping points» and «system flips,» where feedbacks in the system compound to rapidly cause massive reorganization of global climate over very short periods of time — a truncation or reorganization of the thermohaline circulation or of food web structures, for instance, caused by the loss of sea ice or warming ocean temperatures. (eos.org)
Presumably, once the federation gets all this internal stuff sorted out — Goulden said there will be an update early next year — EMC's $ 67 billion merger with Dell will go through and there will be more massive reorganizations to come. (fortune.com)
Developmental scientists consider it to be one of the most massive reorganizations in the lifespan, changing the brains, endocrine systems, behaviors, identities, relationships, and more, of everyone involved. (developmentalscience.com)