No reason to let it go. This was Kuzan's and Garp's 5 minutes to show off and Shiryu stole the show without showing off.
He tanked a hit from Garp and immediately stood up laughing. We havent seen that from anyone after being hit by Roger's rival.
In fact, Akainu went out for quite some time from 2 punches from WB, Aokiji went missing some time from 1 hit from Garp.
Meanwhile, Shiryu is laughing and getting up right away.
Effectively did more harm to the Marine Hero with a nameless stab than Aokiji's named moves.
When Shiryu's full set of abilities becomes known, people like Garp, Kuzan and many others will look cute in comparison.