I think we need to keep in mind that everybody can have different requirements for a pistol. From the environment where they may need to carry, to their physical ability to do so. I am fortunate to have the stature to comfortably conceal a G17 and a couple of mags with little hassle. I also work out in the sticks on my farm. Nowhere near the office/urban jungle some others contend with. If I had to pick ONE, it would likely be the G19. Easy to carry CCW, and I would not feel undergunned pulling it out of my pants, clicking on a light of some sort and dropping it into the safariland holster on my battle belt. The SEALs have abandoned their legacy P226s for the G19. This is the single gun that they say will now answer all of their requirements from deep cover/concealment to overt battle kit. My personal views are that the G19 sized pistol can be enough gun for all requirements. And to show fairness, I don't care what flavor you pick either. Smith, Springfield, Sig, whatever. They all make a mid-sized option. I have used them all, all good choices.
I do find the Phase idea interesting, as I have never thought about it that way. If the regular and open carry of rifles is needed, and the appearance out and around the public produces no out cry, we are truly in a different place. I think we would want to be as strapped as we can be. That said, I would likely have a G17 with an extended mag in my holster!!
2 thumbs up on Hill People Gear. I have used their recon chest pack for everything. Horeback riding, downhill and X-country skiing, road and trail biking as well as hiking and snowshoeing. Carry a lot of gear in there, tight to the body and never in the way. Sleep with it on if needed, no issues. Give them a look.