it is true Kaiten have to return, in PvE Samurai feels wrong, dull and stupid.. like lvl50 but with all that new Kenki/Ogi stuff for no reason, Kaiten was that reason though there are also good changes to the Samurai of 6.1 Tenka Goken for example is now a circle AoE, while true it also challenges veteran muscle memory but in a Good Way in my Opinion..
also funnily enough.. PvP Samurai rocks now.. so well.. I.. jumped to PvP until Kaiten is back!