This can definitely be a touchy subject when overzealous posters express their very passionate positions, so keep that in mind if the conversation derails.
Fundamentally, I am not a fan of the magazine disconnect, but I also freely admit that in -most- of my S&W pistols, it doesn't bother me much. Emphasis on "MOST" because on my single action target pistols that do not have a thumb-decock, the magazine disconnect is MADDENING. Cannot drop a hammer in any way without a magazine and if you have loaded all your magazines the night before a range trip, this becomes a truly ludicrous situation where your options are:
1) damn, guess I leave it cocked
2) safely lower the hammer by stuffing a loaded mag in to an "empty" pistol?! (no! never!)
3) sigh, empty a loaded mag JUST to lower this damn hammer
If you regularly shoot the sweet Model 52 (or a 952) this struggle is real, not imagined.
So, what do I do? Well, because you do need to move the rear sight... all of mine remain intact. If it was easier to remove, I would yank them from my single action target guns that have no decocker but I would leave the others.