Didn't the third Hokage fight Hashirama and was able to defeat him (along with the Second); giving his life in the process? Hashirama seems incredibly weak compared to the current Uchiha Madara. Either that or the Kages are not willing to give their lives to defeat Madara.
Not much of a plot hole really when u think about the difference between orochimaru's jutsu and Kabuto's. Orochimaru's jutsu simply brought the dead back and allowed him to Manipulate them to attack to a degree they could even talk while attacking. Kabuto took that 1 step further and could completely remove all their sense of self.
What i mean to say is when Orochimaru did that to the 1st and 2nd it didnt mean he could make them fight at their best capabilities his jutsu wasnt perfected. On the other hand we have Madara who Kabuto pretty much let do his own thing completely.
i would have to assume that Orochimaru could only make the 1st and 2nd do jutsu he himself knew they could as he controlled them and didnt let them decide for themself other then talk.
Another thing is back when he summoned them it was almost implied that they simply had to fight for whoever summoned them and therefore could decide on how easy or hard they were going to be to whomever they were facing.
Madara is way too powerful. Its getting annoying to me. Why is it that the new generation is so much weaker than the old. Is it a power boost from Kabuto? cause Kabuto did say that he made him stronger than he was in his prime.