I think while this chapter doesn't upscale Mihawk to be above Rocks, it does disprove any notion that just because somelike like Shanks and Roger who's sending out shockwaves or airbar or someshit, it doesn't disqualify them from being Swordman.
So while yes, given how hard Oden is ricking Shanks's dick, there's a chance that Oda thinks of Shanks as being stronger. But until further notice, and until directly stated so, Mihawk is stilll the World Strongest Swordman, and the stronger swordman between the two. Abeit it's still an extreme extreme diff fight