I agree with everything you said expect about the part with Oro......He did have it coming if u think about it.. He trained somone who he believed to have great potential as he(Oro) got weaker as time passed by. He should have expected that Sasuke would betray and kill him at some point other the other. Destroying Oros body was not dishonarable because Oro was planing on taking his body .....(Sasuke is still a dishonorable punk for the other reasons thou)