My guess is 75% filler. The whole 6 tails thing felt like a waste of time. Only the ending had some relevance.
If it is, skip from 4:14 to 16:11, you'll save yourself a boring episode and still miss nothing of interest.
If the zombies have been given the tailed beasts back, it carries a big risk for Tobi to increase the count of missing beasts from two. But then again, it doesn't really matter if it's two or eight since he can't continue without all of them. However, for the allied forces snatching even one more away could be a nice bonus insurance against defeat.
But yeah, the six tails part was totally unnecessary. But since this is Naruto, the shounen filler king, it hardly surprised me.
Yeah, Six Tails was pointless, but if they hadn't done it, anime-only watchers would have wondered why Naruto didn't recognize someone he'd met before.
That's assuming that he actually took the beasts out of the statue and put them back in the Jinchuuriki.
It's possible he's just using a technique to channel the tailed beasts chakra into their Jinchuuriki without actually removing them from the statue.
Still pretty confident Bee isn't going to make it out of this arc alive.