Shiryu will be a DF reliant fighter, not an advanced conqueror.
It doesn't even seem that likely that Blackbeard has ACoC, I doubt Shiryu will lol. If Shiryu does have ACoC, it would be embarassing if they didn't split the skies but at the same time, Zoro can't split the sky for the first time against...Shiryu. Zoro's sky split moment will come against Mihawk, it would have zero significance against Shiryu.
What I'm hoping from him power wise is him awakening his devil fruit to become intangible and feeding a devil fruit to his sword so he becomes effectively the only character other than BB with multiple devil fruits. Would be great portrayal.