On the day I lost my SuperHost status (yesterday), I checked and saw I still have 80% Five-Star Reviews !?!? So that raised my interest in what's going on in review? Then, I saw Help page says it is an automatic rating system. So it is neither human, nor changable.... I guess may be my rating is actualy 79.99 or so?
Further than that, I just happend to have two South East Asia guests who did not write reviews for me but gave me lots of thanks in text messaging to the last minnutes. They are clearly not counted in my Five-Star Reviews. Well, I guess that could partly be my fault, because all my previous guests wrote pretty long reviews of me & my place. And that does discourage non-native English speakers, such as, Vietnamese, or mine to write review.
So I think it is a good idea, and save people's time too, to give people the option of just rate their experience, but not review+rate. I believe many people can benefit from it and Airbnb can still capture their feeling. The rating system can also be extended to give people more items. Like Starbucks, 6-7 minor options are not too much, and if arranged properly, can also be fun and self-reflecting.
Alternatively, next time, I would recommend my guests to just put "Thank you" in review box and then go for the rating. This is probably also a good idea for share.
Best,