1.it is safe to assume that sasuke will use more weapons in his own susano'o.
2.nagato can use more than one tech\path at once.
3.nagato can use the summon's eyes just like he did while using pain.
4.nagato's raw power per technique exponentially increases while he uses his own body.
5.nagato (if he takes the right decisions during battle) is invincible (unlike all the others non-rinnegan users), the strongest shinobi in the narutuverse. unlimited potential.
6.i have now became an official rinnegan fanboy. (maybe i already was one)
7. when under complete control, edo zombies don't fight at their maximum level. each tech is controlled and decided by the edo's user. now we know for sure why hashirama and tobirama were weak against sandaime without using special techs.
8.having both itachi and Bee as teachers is just awesome
9.kabuto is...unlucky. he is becoming fodder. lol (this one is just speculation)
10. it was shown that nagato was anorexic just because he was using gedo 3 years in a row, non stop. when he stoped, he could have been normal again.
if you have found more answers in this chapter please post.
let's discuss this.
now we know why tobirama didn't used his own edo tensei