Please don't take offense that I cut and pasted your post. You have many good points that I wanted to expand on.
When instinct shooting sights are not used at all. The gun barrel is peripheral to the target view. What does help when instinct shooting is a mounted laser. Lasers are all I shoot with now. I have improved my instinct shooting from my hip with the help of lasers. I'm comfortable shooting out to 15 yards hitting a soda can. If quick target acquisition with the sight picture is the real thread's subject, there is no sight system better than a reflex sight. Target acquisition is better with lasers, IMO. The sight radius is much longer, starting from the lasers to the target. There is no sight frame obstruction to look around and field of view is 100%.
I recently changed my reflex sight on my GK1 for a physically smaller unit that mounts much closer to the barrel line and with a smaller dot. That change eliminated the necessity to hold over for short distances (This point is so important for close range targeting. I have designed a sight that achieves 0" vertical offset. This allows the sight to be used accurately from the end of the barrel with extreme precision. There are no sights on the market that can achieve this level of accuracy at extreme close range.) and the dot turns on and off automatically with gun motion. Because the lasers project a beam, I am using a remote wired switch to activate the system to reduce the time the visual signature is on the target. I am developing a wireless switch to reduce switch activation impact on hold position. A reflex sight eliminates the requirement to align front and rear sights and the reflex sight allows a large field of view all around the target increasing situation awareness and the ability to sight over, under, left or right to compensate for distance and target motion without losing sight of the target. My new sight also has 12 levels of dot intensity to compensate for all ambient light conditions including near darkness. Laser intensity can be an issue that can be addressed electronically to soften the brightness at close range. The reflex sight encourages the use of both eyes. This allows depth of view or instantaneous distance perception. Lasers accomplish these goals along with the ability to shoot accurately without the need to align the sight to your body. I have young kids shoot while holding the pistol behind their back and under their legs. Using prototypes, I have successfully shot from 5-100 Yards with a PB rifle, and the projectile zero hold is <+/- 1/2" at any distance from the end of the barrel to 100 yards. This sight maintains the accuracy at close range that other sights are not designed to do. There is no question which sight system is better. In the end, it's all about getting use to all these advantages. In other words, practice.
I make a number of claims that I can defend, if you would like to know more. My sight is not on the market yet, so I won't be going into excessive detail. Many of the points I have made applies to conventional use of lasers. You did an excellent post, and I thought you would like to hear another point of view. Brad