Why are comments being disabled, particularly on a post that asks our opinion?
That said, it's part of a broader strategy and experimentation in discussing technology using platforms other than Livefyre. It's also intended to help bring awareness (and further testing of features) of the Engadget forums.
Axiom: "If it ain't broke, don't fix it."
Experiments like this should have been done before the change to determine which direction to take it.
This new age way of releasing a prototype into the wild and developing it after the fact is lazy and leads only to harsh judgment and ultimately disappointing the very people you want to please.