So was Luffy in his introduction.
Actually, every moment that is used to laugh at Koby and call him a crybaby are great moments.
A weakling having the guts to defy and insult Alvida, who wasn't scared of being held at gunpoint one island later, that later defied Akainu like he defied Alvida and screamed his mind to protect others even if it meant dying, who was just as willing to sacrifice himself by telling Blackbeard to take him in exchange of 800 lives, and now we know he was busting his ass training behind all that.
I don't believe Koby will surpass Zoro, but Koby's fine, he can have CoC, he has good spirit.