I feel he was created from nowhere only for Zoro, that's it
I disagree. Mihawk has been a part of the story since the East Blue. I feel like originally he was meant to play a more active part in the story.
But just like with Shanks, we barely see him. Ever.
I think Oda could have spent a lot more time on flashing out his current character. Show us people actually challenging him for the title from time to time, his current thought process etc
The only time we'll get a true glimpse into his character will be his and Zoro's duel, the way things are going so far. And even then it will be through flashbacks most likely.
Which is a shame. His introduction in Baratie was the moment that got me hooked on One Piece.