It seems like a technique that, in theory, should be utilized by all shinobi - yet we don't see it very often. So it's either 1) more difficult than it looks or 2) simply doesn't fit a shinobis style of fighting.
Perhaps he was unable to use them all. Remember that he only recently got the Rinnegan (right before the war) and he only has one. Nagato had it his whole life and had time to master all of its techniques.
That, and he really doesn't need to use them now with all the black ninja goo floating...
WAAAAAAAAAAY too much for one chapter.
And also, everyone getting powerups all in one chapter? The Third is going SSJ4??? Oro can use Dragon Sage Mode?
It was really good up until those points =D
PS's true power is being a disappointment.
U_U
Also it is never "safe to assume" ;) I wouldn't say Juubito's jutsu is an "Uchiha" jutsu. It's an "Uchiha with Senju DNA and oh yeah also the whole f*cking juubi sealed in them jutsu" :|