I'm not saying that Feige didn't help, but look at Venom, look at the Spiderverse movie, both made a ton of money and neither had Marvel involved. Spiderverse was a legit great movie as well.
Same goes with the Raimi Spidey movies, lots of people still think the first two are the best Spiderman movies out there.
Sony could have tapped some great writers and a director to helm new Spiderman movies and it could have been great, we'll never know. The Feige movies main benefit is that they can tie into the MCU and make use of other Marvel things both within themselves and then having Spidey join other charaters in their movies.
To me Disney had more to lose, not Sony. If Sony hired a good writer and director and the next Spidey movie did well with that they wouldn't have really lost anything by not having the deal, but Disney would have lost being able to finish his story in the MCU and his place that they are pushing him toward (The new Iron Man), which is a damn big role to fill, it would have left a fairly noticeable gap in the MCU and their movies stories to suddenly not have Spidey in them or mentioned anywhere. I mean you saw how many fans were vocal about the whole thing.
I thought it was Sony that walked away?
Also the fact that Spiderman is the most famous Marvel character of all time, dwarfing about any other hero when it comes to popularity.
It wouldn't have been uninterrupted at all, there'd be a fairly decent hole left with how they were taking his character in Far From Home and the role he's going toward, as I said above.
Maybe not give Sony 25% of merch but at least something to make it more of a fair deal.
I mean merch alone for Spidey is over 1 billion a year last I checked, that's a massive amount of money and Sony sees 0 of that.
They may have made a ton of money off Venom and Spiderverse, but their top grossing movie EVER as a studio is now Far From Home.
In most cases they have been incredibly inconsistent and their top grossing movies are thanks to the Spider-Man IP, which is always getting an unseen boost thanks to Marvel and Disney merchandising. How much Raimi Spider-Man merchandise have you actually seen in the wild? Normal 'comics' Spider-man on the other hand?
The idea that Sony should also get some piece of the merchandising revenue is just unhinged from reality. They have nothing to add there, which I don't think you can say in regards to Feige as producer on the films.