TDC, inferior? Perhaps, especially if we were able to use unrestricted magazines in semis. But a revolver is more fun in a whole other way....
....So this is what I did. I pretended to be left handed and held the gun in my left hand. I actuated the cylinder release button (which happens to be correctly placed for a right handed person) and opened the cylinder.
Then I pushed on the cylinder with my thumb and reached around the bottom of the trigger guard with my fingers, actuating the ejector with my index finger.
With my hand still positioned this way I could hold the gun and reload with my free hand. Once the gun is reloaded, the cylinder is now re-engaged to the frame - all done without any hand switching and the barrel pointing safely downrange......
OK, I'm assuming that the thumb you used is the right hand thumb as there's no way in heck that I can reach the cylinder on my Model 19 with my "strong" hand's thumb.
So without letting go of my strong (left for this mirror case) hand on the grips I released the cylinder catch with a forward jab of my right hand so the thumb did a "reach over" to get started. Instead of my thumb, which was on the wrong side now, I used my right hand fingers to roll the cylinder open and my left forefinger to catch it. The thumb of my right hand then moved over and through the opening from the right to hook the gun for positive support. My index finger than seemed to fall naturally onto the ejector. So far so good and yes it is easier to do it in a single smooth action. I also tried your thumb as well but that led to troubles as noted next.
But that's when the trouble starts. A full stroke of the ejector caused the star to actually touch my forefinger which was still held in the grip. Obviously with this occuring there's no way I could eject any brass without those casings fouling on my forefinger and jamming. So it is imperative with a left hand hold with the cylinder opening towards the forefinger that the grips be released to allow ejection. There goes the option for a continuous strong handhold on the grips.
Passing by that aspect for the moment I did find that I could close the cylinder until the pin was resting on the shield but not engaged. From that point it was easy to roll the cylinder with my trigger finger and mimic putting in rounds with my right hand. But now you're asking the less dextrous hand to do the most demanding job. Not a good thing in a hurry. However if you're a speedloader user your forefinger again gets in the way and it's impossible to load. Add to this that the cylinder when held high to see so you can load is trying to close on you and it's a double whammy. And again you're asking the less dextrous hand to do the most demanding task of guiding the noses of the bullets into the cylinder
After playing with this lefty method it got feeling pretty comfy and quick. But it still involves the same actions as the right hand shuffle I described above but mirror imaged for the most part. The difference being that the thumb has to stick through the frame instead of the fingers. But it's the same number of steps and operations and shifts. I also found that the hand around the base of the thumb gets scraped up due to the way I had to reach through to support the cylinder. Points to the other way where three fingers do the same job and don't get scraped.
However there's still no way to load with a speed loader if you don't let go with the left hand. Meanwhile if you're being lazy with a right hand hold and just hold the grips in your strong hand it's very easy and natural to move the thumb out of place to allow for the left hand doing all the unloading and loading without being forced to release your grip. So the open inwards format has more options while the open outwards forces a single format release of the strong hand style.
So all in all I do agree that they should roll open to the inside of the shooter. Although having had a chance to play with this as a leftie I'm more open to the thought. But better? Nope, to load southpaw with an outward rolling cylinder it takes as many shifts and support exchanges one way or the other. Just the angles and fingers through the frame are different. And you lose the option of the slightly slower strong hand support and load since the cylinder must open towards the thumb to allow that option.
_________________________
Edited following further testing......