The guy throws with osotogari often in randori, but he almost always gets stuck when attempting seoinage. There’s some fundamental aspects of the throw he needs to work on, but a lot of it is being familiar in terms of muscle memory with it being complete. Sort of a believe and achieve kind of thing.
That said, tactically, I’m not sure how useful it is because of its ubiquity. My crackpot idea is that being able to exploit the position gained by an unsuccessful seoinage is almost as valuable as having a strong seoinage.
I took some seoinages from him today, but when he got stuck, I just said try the follow-ups you can do. He has one good one (kouchi gari), and they worked on ouchi gari in class today. His follow-up to a failed kouchi is osotogari. Maybe someday he’ll have a directed cyclical graph of techniques.
Eventually, possibly very soon, he’ll have a lot of his own opinions about what to work on. Until then, I will continue developing my slightly unconventional judoka build.