I really enjoyed the article and will refer back to the code snips later for sure. I'm awfully surprised by the people who 1) don't think a rollback plan is necessary (it must be nice to be perfect!) and 2) would rather buy their way out of the necessity to code. Unfortunately, I've never met a tool that would address a full migration rollback. I'm interested to know what tool we are referring to.

As for the what abouts... some of these will simply require different coding techniques, others, such as a dropped column, may require partial restores, but I agree with the author that a full restore of a production environment to undo a deployment should never be your entire plan.