Previously, Gao Yang's weakness was his combat skills. He wasn't exactly someone anyone could bully, but anyone with training could easily push him around.
Now, Gao Yang doesn't really have any glaring weaknesses or shortfalls. With the guidance of the expert Li Jinfang and Gao Yang's own hard training, combat skills had ceased to be his weakness. Especially with his Groin Kick move, Gao Yang was often able to take down combat experts.
Combat skills were no longer a shortcoming, but they certainly weren't Gao Yang's strong suit either. Regardless of the opponent, he had to rely on his signature move to make his mark. However, facing an opponent who knew him inside out and was also highly skilled in combat, all that was left for Gao Yang was a solid beating.
For instance, during sparring sessions with Li Jinfang and Eileen, using the Groin Kick on them wasn't remotely possible, so all Gao Yang could do in front of Li Jinfang and Eileen was get beaten up.