A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.
the uchiha district was visited at least twice since the massacre, correct? (not sure if the anime is clouding my memory with non-canon) i believe it was explained thar it was left in ruin so i don't think it would necessarily have been "cleaned up" for any reason to do with duration.
also.. as this was never brought up to my knowledge ..
is the uchiha "hideout" within the uchiha village? are they even close to each other?
sasuke and itachi had their final fight in the uchiha hideout, correct? it didn't seem to be near konaha, as most of konaha, even its leaders, are unaware of the hideout, much less the tablet.
is the hideout a good distance away from the village?
did they have a secret way of getting there quickly? (like obito's type of ability)
is it shielded from non ocular doujutsu detection?
i think oro and hebi/taka are at the uchiha village ruins, not yet the hideout.
Obito is Tobirama's great grandson. The proof is in the pudding.
The bird thing was silly (in fact, really stupid, in my opinion). I'm going on limb and saying it actually was capable of flight, not merely jumping; no clue how it had the power to cut the Juubi's arms. I'm going with the possibility that Naruto was in control of that, and the Shinobi Alliance were all linked temporarily within Naruto's chakra similar to when Kakashi/Guy were kept within his Bijuu Mode. Who knows, maybe some Wind Element was at work, given Naruto's own chakra nature and all.
the jyuubi arm tails were cut by one of the 2 FRS's I believe as one of the earlier frames had naruto at the front with one and another frame showed him with a FRS in each hand
come fight my brute here
Manga reading list: Bleach, Naruto, Katekyo Hitman Reborn, One Piece, Code Breaker, Gamaran, Kuroko No Basket, Fairy Tail, The World God Only Knows, Kimi No Iru Machi, Good Ending, Medaka Box, Nisekoi, D.Gray-Man, Ao No Exorcist, Freezing, Magi - Labyrinth of Magic, Soul Eater, Rosario Vampire Season II, Iris Zero, Ubell Blatt, Bloody Cross, Sun-Ken Rock, and Infinite Stratos,