Similar to how luffy needed to strengthen his observation haki to stand a chance against Katakuri but it didn’t automatically become an easy fight because of it
It should be the same with zoro and shiryu
What does shiryu have ? That's the question
If his haki and sword skills suck then he gets stomped once Zoro gets COO upgrade.
Katakuri was skilled and powerful outside of fs
Matching his CoO wouldn't give you advantage to dominate him unless you're top tier.
Shiryu will either end up like Doffy or King
Either gets mid diffed as Doffy lost to G4 or low diff as King lost to EnOu Zoro
(Overlal the fight will be very high diff or extreme diff tho)