They know Ota, don't they? At RKwiki it says he did went to train in Kaoru's dojo, but I'm not sure if his name is on the boards on the wall of the dojo on chapter 255.
This chapter 255 ended the series perfectly [ even though there's still some chapters later ]. I think that Kenshin handing over the Sabakatou to Yahiko, giving up of something that was with him for such a long time, and still being happy can be compared to us, "losing" such an amazing story but being happy for having read it, for having supported and learned with it.
Rurouni Kenshin has always been and always will be my favorite manga.
A fascinating history, mixed with historical interesting facts about the Japan, amazing fights, where even the most strange technics had such simple explanations that they seemed almost possible, amazing characters, amazing development, etc, etc.
Whenever people ask me for a manga recomendation, the first thing I ask is if they have already read RK, because I think it is a "must read'.
I also hope for an adaptation worthy the name Rurouni Kenshin, with no fillers, as there's no need for them, and with the Jinchuu arc. I've always wanted it, and with the release of Fullmetal Alchemist: Brotherhood I just kept thinking "If they reanimated FMA, why not do it with RK?". Let's hope they do it someday.