Plus a survey of better received past tributes
On his path to becoming one of the most successful manga artists ever, Eiichiro Oda spent time working as an assistant to Rurouni Kenshin author Nobuhiro Watsuki. He's even credited with the creation of the series' Yui Ikari look-alike transsexual warrior Honjō Kamatari. That hasn't stopped him from illustrating a Kenshin tribute that has had fans shaking their heads.
Fans are saying that they don't like the stylization... or that it looks like Zoro cosplaying as Kenshing... or that it looks like Nami cosplaying... or that it just doesn't look like Kenshin... when they're not just cursing it out.
In Oda's defense, it does look more like the film version
To Love Ru author's Kentaro Yabuki's better received tribute
Oda influenced Kenshin antagonist Honjō Kamatari.
Past Oda tributes include
Jojo's Bizarre Adventure
Final Fantasy 3
Dreams Come True members Miwa Yoshida and Masato Nakamura
Jirochô Sangokushi movies