3/5 for me it was a really average chapter, with a lot of "Woooohh" from Obito which I hated.
When they simultaneously awakened MS that was cool, I predicted that so that was pleasing ^_^
He says "I will never acknowledge this" My initial thought was that he wasn't in control, that the masked zetsu was trying to take control and he didn't want to acknowledge the hatred/being controlled... mask zetsu using him at a weak moment to warp his mind. (which kinda opens up the door to a special super ultimate Naruto talk no jutso, so lets hope otherwise)
If it's not that then, acknowledge what? Isn't your entire life kind of acknowledging that very thing and because of it trying to erase normal existence?
He's fighting against trained mist ninjas from the blood era, and lots of them, we know what it takes to become a mist ninja, especially in the bloody period, so these are all remorseless killers. And he wipes the floor with them with 1 technique that is new to him, and 1 that he still can't manipulate and needs help from a suit to go outside without falling apart. More reason to believe he wasn't in full control.
He also says "where am I" which further leads me to believe he wasn't in full control.
I wasn't fond of how well he used Hashirama cells. He's had his arm blown off a couple of times and not grown it back for entire duration of fights. But here he can manipulate it with ease. (which further yet again leads me to believe he's not in full control, but the mask zetsu instead, with the capability to control Hashi cells.)
As for Rin and Kakashi? All we got is "after we worked so hard to get it", so really we're no better off there . . . what is "it". Humbug.