DVC you missed a couple of points-
...BUT the more stuff you add to your belt the less viable it is, for a dozen reasons. (confort, endurance, vehicle egress, concealability)
So what is your less than full kit solution? Your CH is not it. What and how would you carry mags (how many), COMMS (where at), handgun, light, BOK concealed in 98deg weather? Off carry like a "battle bag?"
You demand that everything be put to the timer as a practical demonstration, I have put everything on a timer and readily admit that a belt reload is fastest.... but I would contend that unless you have worn that rig for 8+ hours while running, getting in and out of vehicles, doing burpies low crawling and grass drills, that the speed of your reload is moot.
Fatigue will set in with that much on the belt without suspenders which I plan to use.
Doing PT in kit is a good rattle/drop test but does not simulate everyday tasks. I don't need a kit that is comfortable to run 2 miles in or do 50 burpies in. As long as it holds retention through a standard O-course (I use the local SWAT teams) it should hold up fine to everyday tasks and mouthing, dismounting vehicles. The biggest issue of which is having stuff hanging outside your normal width always catching on the doors.
Being able to wear the rig for 8 hrs while doing normal activities and it being able to hold up under short bursts of exercise like jumping a fence, 100 yard sprint, mount dismount vehicle is what I consider sufficient testing. YMMV
Speed of reload is the last thing that you should be considering when set ting up gear (unlesss you're just in it for the gaming.) If your in a situation where a half second vs full 2 second reload matters you are A) in a 3 gun stage or B) should be running for cover instead of reloading.
Remembering that this is a layer to a larger setup, one that fills the role of e-loads in that system, speed is right after retention with the nod going to speed. You know this or your belt mounted AR mag would be in a covered pouch also.
1.5 sec = 30 ft of closing distance, the average drawstroke time, speed matters. 30ft can open a shot angle to you while you are loading. Speed is NEVER a handicap in a fight unless it sacrifices accuracy and even then it's not always a losing proposition.
I'm curious to know what your setup is for the scenarios I've been applying toward this rig and it's niche. Do you go from EDC to full kit, plan on EDC + active shooter bag? Not add COMMS and BOK to the EDC?