"meh" is an understatement actually...
Kabuto's advanced edo tensei was a stretch already, but then madara staying alive, the kage comming back, naruto&sasuke beeing inherited by the sages sons, kaguya... all that advanced necromancy just shows that Kishi has given up on his original plot. Bringing back all the old characters, one stronger than the last, one older than the last is just fan-service and that's all it is.
"The next generation always surpases the previous one" - jeah, well screw that now! Even Naruto and Sasuke aren't technically this generation anymore, since they have been inherited by the sages sons.
The cluster**** that ppl call plot nowadays doesn't even make sense at all and has asspulls every other manga, just makes you wanna puke.
Kishi is fed up with it, and you can easily tell.