They are typical of people who think just because they don't understand something that they somehow know better. A P7 is a far more reliable carry gun than any 1911. It is smaller, safer, etc. Running endless tactical and speed reloads is lots of fun, but not much of an issue with non-sporting shooters. Let's face it, the P7 is not the first gun you would carry to a battle field, it is a PDW for Police and civvies not "contractors" and game shooters. In it's intended field, it is probably the best you will find.
Also, double-feeds in a P7 are basically about as common as million dollar lotto tickets. I can see why 1911 folks would think it was super important though. Clearing a phase III with a psp can done with the right hand by using your right hand's thumb on the release. I have practiced this forever and find it easy. Guess how many times I have got to use in in 16 years of shooting p7s? NEVER.
Tap, rack, no bang
Thumb the lock, rip the mag, work the slide 3 times like a mad man, insert new mag.