I love the 1911. With that said, it's heavier, more complicated, and more prone to malfunctions than a number of the newer service pistols. I love 45ACP. But, it's heavier (2x the weight of 9mm), and isn't always superior. Depends on where it hits.
This is one case where the military is not the expert in making the choice. IMO, they need to look to services that USE and DEPEND ON their handguns every day. Of course they need to be assured that the chosen weapon will stand up in combat conditions. If they do that properly, the 1911 will most likely fail in the reliability department. More than one civilian trainer has stated that the 1911 couldn't make it thru a pistol training course without malfunctions.
A patent is only valid for 17 years. That's a short time for a gun design. I'm guessing the patents have expired on most by now.