I'm not really sure where to go to from here, so I'll just recap my main arguments
The Carnage calc should be fine in my opinion. Sentry most definitely was not using his full power against him, and nothing indicates that Carnage survived it by regenerating. We don't see any of that sort of damage take place there
I also think mcb deadpool stuff is fine too. Yes, he has been hurt by weaker stuff before, but so have a ton of characters that are a lot stronger than their weaker instances show. I think that you should look at their best instances as long as they are not ridiculously inconsistent or unreasonable, and evidently, it isn't.
At worst, you could think of Basilisk and Electro's town level stuff as supporting evidence. At that comic where Basilisk did the volcano feat, he obviously wasn't 4B, and other characters who obviously aren't 4B had no trouble fighting him. I don't think it's fair to base future instances to invalidate that comic.
The Venom feat was rejected, but I don't think that the reasons given should completely wipe it from discussion. It still happened. There is also an alternate calc from someone that exists of this feat, and I will return to discuss that (some smart people should probably figure out who it is from)
There is an uncalced feat for Spider-Man in Avengers vs X-Men #9, where he survives a massive explosion. I'd recommend finding someone who can calculate that, I feel it might be important.
This has already been discussed, but at his peak Spider-Man should be capable of crushing Ock's robotic arms, which survived a nuclear blast and yadda yadda etc etc... You can do with that part what you want. I'd be fine with giving him a seperate key as suggested, if you are really skeptical on 7A Marvel Street level stuff
I understand that editing so many profiles is tedious, and that you people have had a lot of discussions about this before. It's fine if you disagree, I just wanted to state my arguments.