This seems like one of those higher end sushi counters, where you get one or two pieces at a time. You generally shouldn’t put rice in the soy sauce as the rice would fall apart. And you really shouldn’t pass the sushi with your chopsticks to another set of chopsticks. All of the other things are fine in an izakaya setting. A colleague of mine who was in sales and had to make sure to cater to our customer’s wishes was absolutely fine with mixing wasabi with the soy sauce for example. She one hundred percent knew about etiquette.