For MCU Vision, I liked the Jarvis connection and lean into it. Instead of being a new entity, I'd just make him the Jarvis AI in a new body, learning to deal with his new experiences. For a human identity, he could pretend to be Edwin Jarvis Jr.
This would work better for the Avengers Academy mobile game.
I think MCU Riri is gonna create Viv in an attempt to ressurect her dead friend. It is a rehash but it is a believable rehash and one that could be in-character for Riri. Whatever their next plans are for Vision, I doubt they are gonna adapt Tom King's run. So this is just a backup and it might lead to Avengers AI.
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Riri's not as bad as everyone made out. She just suffers from a bad first impression. Bendis rehashed what he did with Miles and that was a bad idea.
Kamala's main issue is characterization. She's pretty bland compared to the other characters. So I'd lean into her discovering who she is outside of being a superhero fangirl. It's not a big change but more of a tweak. I liked her being an inhuman but if they want to change it, I'm fine with her being a member of Clandestine.
I liked Amadeus being the next Prince of Power and I'd lean into that more than him being another Hulk. I'd make his time as Hulk temporary.It also fits the role reversal element of Young Avengers.