Again, Zoro's Santoryu hasnt changed at all. It's unique to Zoro, a self made swordstyle that he himself created.
He asked Mihawk to teach him "the way of the Sword" and came out of the TS with Haki.
So tell me, what swordsmanship did Zoro learn from Mihawk? Did he learn some new "Hawkeye Swordstyle" that he's been saving in his arsenal?