A funny thing is.... looking through some OLD news articles. Sony may only have film rights to Spider-man. Marvel might have the Television rights. It looks like at some point Sony could make Television shows. But the last 2 series were made in house without Sony's involvement. So the Spider-man tv series Sony wanted to make... They might not be able to make it. Marvel made the Ultimate Spider-man and the Spider-man 2017 tv series.
So Tom Holland could just re-appear on Disney+ but not in Marvel movies. There might be a big reason for the upcoming shift to TV shows.
Also, there was a video a few months back explaining about how there may also be some logic to why every character in home-coming is dramatically different then their comic counterpart. Ned is nice and his best friend, no word from Harry, MJ is not Mary Jane, He has a Stark Suit, Aunt May is Hot, Mysterio is a Stark Employee not a film worker. Some of the logic of the variation is that these differences make the characters differentiated from Sony versions.
Tom Holland probably has to do the next Sony movie though because of his contract. But they may just drop him in favor of a replacement.
As far as anyone proving that Spider-man is better in a MCU universe just look at Spider-man 3, Amazing Spider-man 2, and Venom. Most Spider-man movies are good under Sony. There has just been this cycle of: find a good director who loves the character, and then devolve into a studio notes movie. The first 2 Spider-man movies were good. Spider-man 3 you could see the cracks. Sam-Raimi could have done a great movie that revolved around Sand-man with New-Goblin as a secondary foe. But the studio had to shoehorn Venom in. Had there been a 4th movie that focused on Venom that could have been better. Or even a 5th movie. I've heard rumors Raimi wanted to do Vulture for 4 with John Malkovich though. Raimi took his time with the part 4 production and they had to fire him because they had a timeline otherwise they would lose the rights. They tapped Marc Webb to make Amazing Spider-man. There was some weirdness. They went Darker with Amazing Spider-man, but overall it was a good movie. The biggest complaint was the re-tread on the Origin story. Still with Lizard in the Mix it was pretty good. Amazing Spider-man 2 was hot garbage. His suit looked great, but it was an entirely incoherent movie. They tried to do Electro, Rhino,and Green Goblin at the same time. It had a completely muddled storyline. It was a stark difference from the previous movie that had characters that seemed connected. Venom was both bad, but not that bad. I liked how it had allusions to the movie Life without having a real canonical connection. I really wish they had gone all out with that aspect. I didn't like how the Symbiote was unconnected to Spider-man, but overall I was entertained. I was able to enjoy the movie for what it was even if it wasn't a Spider-man movie.