Let's put it like this. Your player is really a bit too tall for a "inside-out" SF. But there are successful 6 foot 10 SF, like the ace in Lietuva NT and the one owned by Secret Agents. I'd say that 6"9 is still alright and with this kind of outside skills, it's a waste if he doesn't become a world class SF in the future. But of course, he's probably a inside-focused SF. Stop training 1on 1. Train OD to 12-13 at the very least. This will take you roughly a season (yes, it's real slow for a 6'9). At the same time, ID may rise to 10. Then train RB. With his potential, his sky is unlimited, if you are patient enough.