Unless we're talking about about 70's/80's, where Marvel Team-Up might as well have been called "Spider-Man team-up"
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Yes, but it wasn't used much and usually didn't last, we had moments like of Ends of the Earth where he's pretty much ordering the Avengers around and using them to counter pick the Sinister Six despite him already using an armor specifically made to counter the Sinister Six, before Otto manages to outsmart him, and even after that he still had his moments like when he bluffed well and made Sandman think Spidey was gonna kill him if he didn't help, and convincing Mysterio to help him out, think maybe he was being smart when the Avengers were freed from Otto's mind control too?
Ends of the Earth is the one that shows it the most, but there were a few moments here and there, like how easily he solved Superior in one issue, PI era had it at the beginning (And fact SHIELD asked for his help and not just Peter's money shows that) and Johnny even comments on it, and in the Secret Empire Tie-in, he ordered the Avengers around which is what helped them to escape.
Basically it was rarely ever there, but it happened, once every blue moon.
Huh, wasn't aware of those lol.
While Slott's Peter can often not react to stuff, didn't he say something like "You're not my brother anymore" to Ben?
Also, it's very possible that the Peter Kaine and Gwen saw in the other universes was actually Ben after killing and replacing him, which is something that Ben possibly was planning to do in 616, not being blonde is a huge hint towards that.
Edit: Also, the AU Peters were working with Jackal, while it's possible they're working together because of desperation, it can be used as a hint that the Peters there were actually Bens.