Interesting, it seems more like an assembly error, Ruger had an "issue" like this that led to the introduction of the Super Redhawk back in the 90's, a change in the lubricant used to screw on the standard Redhawk barrels caused a few to launch themselves downrange. The problem was corrected but the Super Redhawk stayed in production.

I don't think these incidents will be enough to make S&W stop using 2-piece barrels. In todays "production" mindset, be it cars, guns, etc. the manufacturer would rather fix a few "errors" than change a production technique. My '05 Dodge Magnum came from the factory with two bad wheel bearings and I didn't get so much as a "sorry" from Dodge. The dealer just fixed it.

Interestingly none of S&W's blued guns use the 2-piece.