Replacing a DVD burner doesn't usually take any more expertise than knowing how to turn a screwdriver and unplug/plug 2-3 unambiguous connectors. For a great many people, that's a LOT easier (and less scary) than going through all the software steps you outlined (as a consultant, I've worked with clients who won't do anything at all as soon as it involves typing commands into a CLI!) Also note that I specifically qualified it as the penultimate 'worst-case solution', which, all by itself indicates that I didn't intend that it should supersede yours. I absolutely concur that it's beyond stupid that Microsoft has done this, and that I quite hope that they'll get their head out of their backside for future releases, but, from their history, I'm substantially doubtful that it'll even register on their radar.
I went ahead and bought the drive because of my expectations wrt MS's likely inaction on this, plus the ability to write 9+ GB DVD's is actually useful to me, and $50 isn't such a terrible cost to acquire that capacity... In any case, I merely posted it so that any future readers could see that option IS a viable alternative means of solving this problem.