Can the Cambrian 'Explosion' still be used as an argument against Neo-Darwinism?

The most likely explanation, as I understand it, is the end of the Snowball Earth period, where the world was largely covered by glaciers. Early animals appeared to have evolved during this period, probably between a hundred million years up to even half a billion years before the Cambrian. However, once the glaciers started to melt, we see a huge increase in biodiversity, starting with the Edicarian Biota about 60 million years before the Cambrian Explosion, continuing into the Cambrian period which lasted another 60 million years.

What really changed in the Cambrian wasn't the evolution of animals, but rather the evolution of hard skeletons. These first appeared towards the end of the Edicarian through the beginning of the Cambrian. This seems to have led to a massive arms race between different levels of predator and prey. Further, the earlier microbial mats that covered the sea floor were finally eaten up over the course of the Edicarian/Cambrian time period, meaning the simple burrowing and grazing lifestyle of early animals was no longer an option in most cases.

/r/DebateEvolution Thread