Dan, could you explain that a little. I am having a hard time envisioning how anything is under undue stress. I lock the slide to the rear, flip the takedown lever down, gently lower the slide, then pull the trigger and the slide comes right off. It appears to me that at that point the sear is the only thing holding the slide on. I could see how pressing the trigger and then dropping the slide abruptly under full recoil spring pressure might screw up something, but otherwise I don't see a problem.
I removed mine a long time ago and have not experienced any problems. I do not like having to use a tool to take down the gun or stick my finger way down in its gullet with the slide back, thus taking a chance on getting an M&P version of the M1 thumb. It was also my understanding that this device was put in the gun because S&W did not like the liability of requiring the trigger to be pulled in order to take the gun down. A number of NDs on Glock happened over the years, or so I am told, because of this. Any enlightenment you can provide would genuinely be appreciated.