No domestic manufacturer has pinned barrels in generations. "Crush Fit" done correctly works, at least on steel frames.
Recessed chambers offer no performance benefit with modern centerfire metallic cartridges, but do enhance the possibility of cylinder drag and/or ignition problems, due to harder-to-clean crud build up in the recess. They also make it harder to quickly determine loaded status. It's an aesthetic only and on a working gun I prefer it gone. If they were so essential for SA revolvers, Ruger would have used it, and they don't.
Shrouded barrels are subject to canted assembly if the shroud doesn't mechanically index on the frame. My last S&W purchase 432UC had a canted shroud with front sight... I was able to move it myself but it was frightful. I'd rather have a non-shrouded barrel as at least I have a better chance of repairing it with homemade tooling and jigs. You're not hand-making the torque wrench needed for the S&W barrel shroud, and it's not available outside of the factory.
I agree with the elimination of the hammer nose, it was a weak link. MIM parts don't bother me either if they are not aesthetically ugly, such as hollow-back triggers. The integral cylinder lug on the frame is just one less part to have to be fitted, loosen or wear up over time, and need to be replaced. As far as the "long" frame redesign to accommodate the lock hole goes, I doubt you will ever see that revert. That change has been made and it's done. Willy-nilly forged frame changes are expensive, and the new frame does have added strength.
Threads like these smoke out all the big talkers who claimed they wouldn't buy a new S&W until they got rid of the lock. Well guess what, then they nit-pik anything that isn't period correct circa 1948, 1957, 1973 - pick your era. It turns out that most of these types wouldn't buy any new S&W unless it is made the exactly same way as 65 years ago, and at a bargain price. Which means, not at all.
These odd choices for retro editions are all based on S&W figuring the semi-auto market is saturated, and maybe these pistol gunsumers want a revolver range toy. I don't expect the quality to be any better than the revolver poop they've been putting into boxes for the past 5 years. IMO, it would be far better if S&W simply announced: We Make It Right or Your Money Back.