Funny you mention for me to check on the chapter because I've been doing that the whole time.
Right after Bee leaves the lake the Hachibi asks him why he even summoned him in the first place when he "had the upper hand". Bee then says "I guess I just got carried away." Now does that really sound like someone who was struggling or was in desperate need of chakra? This clearly shows that Bee did not seriously need to use BM but just chose to. He already obliterated Taka with V2 so going to full Hachibi was clearly not needed and was just to show off.
Suigetsu sees Sasuke channeling his sword and specifically calls Sasuke's attack "the unblockable chidori blade", so it's not just a basic raiton blade that he was using. And of course Bee didn't get an opening on Sasuke before the raiton clash because he had just finished off Suigetsu and Juugo and didn't even look at Sasuke yet. The very second after Sasuke charges at him though he gets 7 swords in the chest.
As for the tentacle getting cut, it's organic matter, not solid steel so of course a chidori would cut through that; s would any other sharp object for that matter. In terms of ninjutsu vs ninjutsu though, Sasuke's "lighting cutter' definitely didn't do what it's named for.
Also, yes, Sasuke did intend to Kill B. Initially he tried not to but after he gets owned once Suigetsu says "Forget about trying not to kill him, we've gotta fight to kill him!". After that Taka attacks again with an intent to kill and Sasuke end up getting his chest blown apart.
I was talking about the Chakra exchange chapter. I even mentioned it clearly.
Viz: Bee: "That Sharingan guy was probably the toughest guy I ever fought." Don't just post one side of the story. Bee lost in the end. This doesn't sound like someone who was playing around. Bee behaves like a moron. He was rapping and doing the same thing against Kisame as well. That doesn't mean he didn't nearly get his legs cut off and suffered the consequences.
The guy with Bee was saying Bee wasn't taking Kisame seriously, yet he went V1 and then V2. Seriously or not seriously, he utilized all his arsenal to the max. Given that he has shit in his arsenal other than Raiton sword and Bijuu moves. Which kinda puts a dent in the "fooling around" argument. Had he not used his Bijuu powers, I would have taken this statement seriously.
I don't care what happened to Jugo and Suigetsu. They were good distractions though. That is its nick-name. Orochimaru's Kusanagi also cannot be blocked. But didn't quite cut through V2 Naruto. It's because under normal circumstances, if Raiton is not involved it would cut through the blade like butter. But Bee had Raiton. Things changed.
You missed the top panel where Bee and Sasuke had a long clash? Yeah, okay man, he didn't even look at him. Are you sure you are reading the chapters?
Hachibi's tentacles are sturdy enough to create whirlpools and guard against powerful attacks. That doesn't change its feat. Now you are just making up excuses. Sorry, to even think you believe that Bee's Raiton matches Sasuke's is a ridiculous assumption.
Do you even understand context? Doesn't seem like it. That was the very first time it was ever shown that Perfect Jins can break Genjutsu. Sasuke didn't know that. Sasuke saw him skid down straight by his feet. He breathed, sighed and then turned around. How long would it have taken him to cut off his head with Chidori blade? A second.
Suigetsu had him in Suiton. Sasuke again chose to paralyze him. All he had to do was aim a little higher and Bee would have been dead. That's twice Sasuke had him within his grasp and he chose not to kill. Count Amaterasu and it would make three. So three times Sasuke let him live and Bee, who was
JUST fooling around (according to yours truly) went in for the kill every single time?
Haha, Yeah, okay, man.