Is the only complaint that the safety is "mushy"?
It's not a big deal to examine the safety detent mechanism. Under the safety lever on the left side, a small plate slides within a groove, just forward of the safety's pivot shaft, and that plate is acted upon by a pin that extends from the safety lever. The plate is V-shaped, with the point facing forward, against the lever's pin. A coil spring, located in a hole that traverses the safety pivot, pushes the plate firmly against the lever's pin.
If you're very careful in removing the safety, you can remove the safety, plate, and spring as a complete unit.
If the plate does pop out, it's pretty time consuming and frustrating to get back in place. There's actually a small hole through the safety lever and plate that looks like it could be used, by inserting a pin, to keep everything together. I tried, but it didn't seem to align.
If that v-shaped plate is more rounded than pointed, or the coil spring is binding, I suppose that would account for a mushy feel.