He will woop Zoro's ass, but I doubt he can trade blows with the current Zoro. If he can match Zoro offensively instead of puncturing him with sneak attacks, I don't see why he wouldn't murder most top tiers—without good enough CoO.
Glorified Hide & Seek merchant.
Zoro needs to git gud then, invisibility is a part of Shiryu's powerset. Fights consists of more than AP and Sanji whooped Absalom's ass who had that fruit anyway, if Shiryu was only a df merchant Zoro should dispose of him without getting his ass whooped. So if you agree he's getting his ass whooped, then that already makes him impressive.
Magellan level without invisibility never forget that. Magellan's portrayal had Croc, Jimbei, Ivankov running for their lives. Top tier? Nah (if by top tier we're talking about old legends as the cut off), but above Zoro atm? Very possible.
Zoro fans either reaching for the stars placing Shiryu at Admiral level, or doing the opposite calling Shiryu a bum and below Zoro. Where's the middle ground? Maybe it's because y'all already think Zoro should be taking on a top tier in his next fight...but maybe we need to be humbled? There is a massive gap between the strongest commander we've seen in battle and the weakest top tier after all.