Well, to me, Akari has something that makes her fall into the category "Idols That You Try To Get Into But Can't". Of course, it's just personal opinion. I prefer sensuality in movies over "crazy moves".
The actress visual is very important for me, so if I don't find the girl attractive, I don't even watch a movie. So I only watched Aki Kawana, Megumi Shino, Misato Nonomiya and Leila Hazuki "Girls Who Like Cock Shabu Shabu" movies.
I forgot about Leila's video. It was very good. It is too bad she did not become a bigger star. I do not know why I did not keep Megumi's video. I think I did not like her finishes. They were not very deep like the ones I mentioned + Leila. I have much better videos from Megumi.
Misato is very cute. They all are. But after watching the video again, I definitely thought her technique was not noteworthy. You said that she could take dick all the way down but I did not see that, at least where it count during the finish.
Akari is sensual as well. The first gif clearly shows her moving sensually with her mouth and hands. She has performed this way in plenty of videos. The point is about her range of techniques that few idols can match, including the ones you listed, not to mention enthusiasm. We are going in circles, lol.