Link pins tend to crack when they are "stretched" between the barrel being forced up on the slide stop and a short link. That means that there is some fitting problem with the gun. The strong recoil spring doesn't help any but may not be the root cause. If everything else is OK (the barrel locks up OK and the gun is accurate) one answer could be to ream the lower link hole to create a little more tolerance.
Assuming the gun is new, I would say that if it happens again, return the gun to S&W for a thorough checkout.
BTW, I agree with Old Fuff, there is no such thing as a free lunch. IMHO, those super heavy springs are NOT necessary and can cause problems.
As to "battering" the frame, the slide doesn't touch the frame; what is battered is the recoil spring guide. Further, the design is such that the slide bouncing off the guide lets it get back some of its rearward energy for the forward movement, leading to better feeding. Heavy springs or buffers eliminate that "bounce" and cause trouble on the forward movement.
In brief, don't mess with JMB, he knew what he was doing.
Jim