Series 80 lockwork makes John Moses Browning (PBUH) spin at high RPMs in his grave.
The 1911 as sold to Colt by JMB had two safeties already incorporated into the design - the thumb safety and grip safety.
These worked just fine until Colt invented the whole Series 80 plunger monkey-motion. It was something of a solution in search of a problem.
It adds extra drag and linkage to what was previously a nice clean trigger assembly. In addition to tripping the sear notch, your trigger pull now pushes a spring-loaded plunger up into the slide, freeing the firing pin to once again move forward.
The flip side is, if you remove it to make it function closer to the original 1911 lockwork, you've officially removed a safety device in the eyes of the lawyers (both criminal and civil suit). That's not a defensive gun show-stopper, but one should be ready to explain it under cross-examination.