All of the women in the higher categories can do what she can + take it down further. That's why they are higher. Anyone can find shots of all of them doing the same things you posted and more.
If I got a real back massage and someone lightly went over my back and never did deep tissue, I would feel like I wasted my money and wouldn't return. That's how I feel about her BJs. She is gorgeous and has pretty good hip control, but that's really it for me.
Well it's subjective. We all have different standards. I'm more focused on technique. I don't consider it a deal breaker if a woman can't deepthroat. Those pics I posted was just proof I use to show that Reiko has other assets that make up for her not being able to take a cock all the way down. When she swirls that tongue of hers all over the cock and balls it's very hot. I'd take that any day over a woman with a sensitive gag-reflex forcing herself to deepthroat because then it's like you're just waiting to see her upchuck her lunch. Major turn-off for me.
You have Kurea Hasumi, Sara Saijo, Misaki Honda, & Shien Fujimoto in your mid tier and I would use one word to describe their bj scenes: skippable. I've seen multiple flicks from each and I can't remember a single bj they've done that is worth watching. And that's shocking to me considering their popularity. Misaki Honda was especially disappointing with those sexy lips she has. No way I could place Reiko below them.