Chopping things up cant replace a serious Zoro vs Mihawk fight. Even if Zoro can cut something that Mihawk cant, it doesnt place him automatically above Mihawk because that doesnt matter in 1vs1 since Zoro's body is easily cuttable for Mihawk. Their fight will be serious and the greatest cutting achievement will be cutting through the Black Blade which has never been done before. It has been foreshadowed, Mihawk told Zoro to treat every nick on the blade as mark of shame while Yoru will be completely cut through instead of just having a nick.
I mean, it's possible either way Topi-chin, it's just that if Zoro vs Mihawk happens before other fights, everything else will lose hype because the greatest challenge already happened. Unless the challenge after Mihawk is beating 2 guys who are almost Mihawk caliber(Kizaru+Gandhi)...
Also, just like Luffy got 5th Emperor hype after WCI, Zoro can get WSS/WSM hype too after Wano. We already see it happening with King of Hell, it's only questionable if that hype will transfer to entire world or not... Another thing is that I cant think of a better fight for the last fight of One Piece.
Impatient Topi-chin...

I am on le phone and typing as fast as I can.

If Zoro defeats Mihawk before EoS he will get a new dream, from WSS to just WS but he already gets that kinda by defeating Mihawk... Unless Oda pulls some BS with Gandhi aged back to his prime is stronger than Mihawk or shiet like that...