Thoughts, in no particular order.
This quote from the linked article is very interesting in light of the FBI's 9mm ammo trials which resulted in a contract award in late 2013 for a new 9mm round for the FBI:
"The FBI and several major police departments recently decided to return to using the 9mm round after finding that .40 caliber ammunition was causing excessive wear on its service pistols."
In case anyone came in late, the new ammo chosen by the FBI is the newest generation 147 grain bonded hollow point. It is not the old Q4364, but the new Q4392, which they say performs very well indeed.
The people in the military have a problem, and that is reconciling the supposedly treaty-required use of full metal jacket ammo with stopping power. It has been established long ago that FMJ ammo, even the up-loaded 9mm NATO round, is not very good at stopping power. On the other hand, with proliferation of chest-mounted magazine pouches and other accessories, which may or may not be worn by enemies, the 9mm is the only one of the conventional rounds which will penetrate those barriers deep enough to reach vital organs.
A secondary problem is that the Army does not train most recruits in the use of the pistol, and other than special forces, not too much emphasis is put on the pistol for those that receive training. For that matter, a friend who recently went into the Army indicated that even rifle training is lackluster compared to most private shooting schools such as Gunsite or similar schools.
Thus, the idea that under-trained recruits are going to handle a heavier caliber pistol better than they handle the M9 is not a promising prospect, and even if they do, the age-old question of capacity versus stopping power is now complicated by the need to penetrate not only fatigues, or other clothing, but also chest mounted magazine pouches and similar barriers on enemies.
It seems to me, therefore, that the make and model of pistol is the least of the concerns, as the pistol is just a launching platform. Until the military gets serious about adopting a cartridge that will perform all of the tasks expected of a modern military round, there can be no determination of what pistol to use.
If they go about this correctly, the ammo trials should come first, then the pistol can be specified that will handle the chosen ammo.
Given how the process went in the 80s when the M9 was adopted, it would not surprise me if this program takes the better part of a decade.
And even then, I am willing to bet the choices made are not stellar. After all, although the folks involved in the M9 program have mostly retired by now, the current crop will represent "everything we have come to expect from years of government service."