I agree with most of you. Just to make this discussion of a more fun, let me play with traditional mongolian wrestler's watch. (I learnt it from our elders)
A wrestler is truly great when following 4 characteristics are all met in an outstanding manner:
1. Body build
There can be some ups and downs on these, and even surprises.
As everybody can tell, Asa has an outstanding athletism, profound will to rule, and amazing ability to calculate his bouts with deadly accuracy. In short, he is naturally talented to be a terminator.
Kaio has a frame which can be compared with only that of alpha male gorilla. However, we all know, what he lacks. (no hope)
Tochiazuma has utter will to win and succeed most of the time. But he doesn't know how to surprise his opponents, basically coming with the same weapon everytime. No talent. Everybody knows about his injury plagued body. (no hope)
Chiyotaikai has lesser body strenght then the fellow ozekis. Again, he has only one song in his disposal. No talent (no hope).
Hakuho's body build needs no attention. His will seems to be lagging behind his achievements, but will not take very long for him to figure out who he is. He is the only rikishi at present, besides Asashoryu, who can really learn from his mistakes and act differently each time around. Naturally talented. Considering his age, he is the only hope.
Kotomitsuki might have some will and talent, though it is not very evident. However quick rise of youngsters like Hakuho and Oshu may provoke him enough. His ability to control bouts intelligently isn't that good. Even with the will and brain, his body build is just not enough for ozeki. (no hope)
Kotooshu's body build doesn't need attention. He also showed very strong will to be the top gun. He is very gifted wrestler. It is just a matter of time that he learns all sumo tactics. He has a shot for Yokozuna in coming years, if Asa and Hakuho will allow it to happen.
Miyabiama. Body is hopeless, no talent, no intelligence, no will, so no hope.
Wakanasato's build is impressive except his buttock muscles. If you look at wrestlers at ozeki and above, their buttock muscles are very pronounced. That means Wakanasato has just not enough thrust. The biggest thing he lacks is will. So, no hope.
Roho has a build, talent and will. But it seems that his brain power isn't just enough. He reacts too slowly. A long career in Sanyaku is waiting for him. No ozeki.
Kokkai's weight has already crossed the treshold where he will no longer be able to move his body efficiently. More on that, he is not showing any sign that he is learning a thing. No talent and no hope.
Kisenosato has a real talent and intelligence. His thurst for fame will come just on time. The only worrying thing about him is that his weight might increase faster than his career, eventually making him just another Iwakiyama. Ozeki post is waiting for him, if he can keep his weight in control.
Ama has everything but body build. But it is just for now. His father, one of the famious Sekiwake in Mongolian sumo, has recently told reporters that Ama's body is developing exactly on schedule. Ama might be the biggest surprise rikishi, he might have a shot at ozekihood.
Asasekiyu will take where Miyabyama left.
Kyokushuzan has everything but will. He doesn't want to win a yousho. I mean it literally.
Kakizoe would be ozeki if we can magically increase his size by just 10%. He is an excellent wrestler.
I think I better stop here since there are no more hot rikishi around for the time being.