Correct you are, sir! My late Dad carried a S&W 1917 before they took them away from his cavalry unit. Liked it so much he bought a surplus one after the war. He said they preferred half-moon (3 rd) clips because they were easier to pack and so that's what I learned with. Sweet revolver.
I'd be happier if they defined the mission first and then decided on the specifications. A pistol/revolver that has to meet sentry duty requirements, MP/officer carry requirements, and special forces entry weapon requirements simultaneously is going to have to make some serious compromises.
In the military, concealment is not an issue. Weight is more of an issue and that is better solved with holster and suspension designed into the uniform IMHO. This would have kept the 1911 around longer.
They dealt with the weight of the weapon rather than the perceived weight as handled by modern suspension and holster systems which can be engineered without the conceal carry issues needed in the civilian world.