-You said "Tobirama has tons of Kinjutsu" I used that same argument which was reinforced by Kishimoto himself.
-Minato is bound by Edo-Tensei, he cannot escape unless proven otherwise
-Kabuto fights in HTH combat aswell; he will be touched.
-When Orochimaru touches him; Kabuto's DSM goes away along with Orochimaru's chakra; he can then restrict his movements with the CS he gave SZ
-What does your last point mean; they're near full power now and Orochimaru explicitly stated he could control them; but he won't.
Yeah, lets see Orochimaru control 50% nine tails, tried to control Hashirama and failed, he is comparable to the 50% nine tails.
DSM doesn't go away from Kabuto, it's Orochimaru's chakra that he took from him, that's not going to stop Kabuto from staying in DSM, it's his own technique that he has. I have no idea what SZ is though, no idea what HTH is either.
Kabuto won't even be touched by Orochimaru unless it's Kabuto sending the attack, once Orochimaru is able to dodge a susano'o arrow while blind we can say otherwise.
Once again, we have not seen any other Kinjutsu other than stealing bodies and reviving the dead, which is most likely all stuff that he got from Tobirama.
Orochimaru tried to keep them in their place, which he couldn't do, he didn't take control of them and get rid of their personality/emotions.
He can do that, but as we saw when he did that in part 1 they were severely weakened.
And there is one last thing that you forgot, do you even think that any of these guys are even going to let him summon any of these guys with ET? even Naruto could beat him right off the bat by keeping him busy and just not giving him the chance to summon them.
And even if he got the coffins up, they would be destroyed the same instance.