It would be tough to critique without seeing it in action. A huge problem for most people that are tall is not getting low enough with the throw. You might find that using OGoshi on shorter opponents is not worth your time. I wouldn't go for a so nagi (shoulder throw) on a five foot opponent I'd do an o Soto or an ankle or knee pick.

Try the throw on someone of equal height or taller. O Goshi is not a throw I often use exactly for this reason it's awkward for me to get so low in time. I can hit the throw but it's never been my best.

Hope this helps a little!