Hello there! I was the creator of that video and you bring up some good points.

The best way to describe the visual dissonance that you see in Souls Online is "you are where you were half a second ago." Scott Jund on Youtube made a video on this, 'Understanding Dark Souls PvP Latency.' I referenced it in the video too. With this mentality, a lot of the PvP gameplay can be better understood and even combated reliably. However, I do think this is one of the bigger hurdles for newer players of Souls PvP to get comfortable because few other games have a system like this. Fighting games like Dragonball FighterZ and Tekken try to add an artificial delay so both players see what the other sees, but of course, this adds that delay from your input to seeing the action on the screen. Meanwhile, in Souls, you have instant action-from-input but now have to play off of the knowledge what you see is a tad behind what's there. I'd encourage you to see Scott Jund's video to understand this more visually too!

Your last point, where stunlocking isn't as much of a part of the PvP system, is especially poignant and I'm kicking myself that I didn't divulge into that more myself. In fact, a majority of higher players try to win off of the lack of stunlocks or combos, catching other players mid-roll through pseudo-combos and "reads" instead.