It's hype for Mihawk because Mihawk is the current strongest swordsman, and Xebec proves irrefutably that you do not need to master 'cutting' to be considered an exceptional swordsman, contrary to the general gist of that post you tagged us in. Weaker swordsman does equal weaker overall. Shockwave swordsmen are just as valid as cutting swordsmen.
Xebec being stated as a swordsman by the narrator no less is finally proof that guys like Shanks and Roger are undeniably swordsmen, and that Shanks is 10000% included in Mihawk's title.
Your issues with Mihawk's portrayal vs Shanks' are aside to the simple point that when Oda said Mihawk is the world's strongest swordsman with even greater sword skills than Shanks, he was literally telling us Mihawk > Shanks. Actually quite outrageous considering he usually keeps these things ambiguous.
Imagine, bro could've stopped at "Mihawk is the WSS" and that would've been enough, but it's like he knew this whole hakiman Shanks debate has been going on for decades and wanted to finally nip it in the bud lmfao. Man randomly included Shanks' name in his Mihawk wank chapter just so that nobody had any confusion as to who the strongest swordsman in the world is, wild.
People can bring up Vista, his portrayal to the world etc... but the fact of the matter is, Oda has proven he is more than happy to say Mihawk > Shanks in a direct comparison. He is literally the world's greatest leecher, as Mihawk cannot be weaker than Shanks from a narrative perspective. His title isn't a rumour, it's official. Mihawk is just a chill guy who is yet to fight seriously — he'll get his love; at this point there's no point in fighting it, just wait for the feats. The longer we wait, the crazier the feats due to power creep. Honestly the biggest nod to Mihawk being wildly strong is the fact that he's this strong and completely unblemished by scars. He has this untouchable air to him that even Shanks doesn't have.