Collection Mode Visibility Issues and Suggestions

I have two relating issues when trying to group my movies and series into collections.

First issue
I have a collection for the Marvel Cinematic Universe (MCU) with multiple movies of Iron Man, Captain America, Avengers, Thor, Guardians, etc. and just single movies of Hulk, Black Panther, Spider-Man, etc.
I want all of these movies to be displayed within my library as well as in the MCU collection. But I also want to group all the multiple movies together (Iron Man, Captain America, etc.) and not display their respective individual item in my library, only inside their respective collection and the MCU collection.

The issue here is that if a movie is in multiple collections and any of those collections is set to “Show this collection and its items” it will always default to showing the items in your library, even if all other collections is set to “Hide items in this collection”.

Second issue
I have My Little Pony: FiM in my series library and My Little Pony: Equestria Girls and My Little Pony: The Movie in my movie library.
There are multiple sequels of Equestria Girls so I have them grouped in a collection. (Equestria Girls and MLP the movie should not be grouped together since they are different “movie series”)
I also have a general My Little Pony collection in both series and movie library which include all these items as well, to have all the respective items show up as related shows/movies.

The issue now is that the Equestria Girls collection is set to “Hide items in this collection” and the general My Little Pony collection is set to “Hide Collection” (which implicitly sets it to show its items).
This will cause the items in the Equestria Girls collection to be shown in your library since it is included in a collection that shows its content.

My suggested solution(s)
Either have an option in the collection to override collection mode for all items in that collection.
So that if a movie is in multiple collections and one of those collections is set to override collection mode, the movie will follow the options of that collection and ignore all other collections options.

Or, have an option in individual items (the actual movie/series item) to select how that item behaves when it is included in a collection.
So I can for example set Black Panther to always be shown in your library when it is in a collection or the opposite for the Iron Man trilogy. (Always hide from library when grouped in a collection)

Alternatively you could just reverse the current priority to always hide items in multiple collections where at least one is set to “Hide items in this collection”.

At the very least items in a collection set to"Hide collection" should not be shown if they are also in a collection set to “Hide items in this collection”.

And of course if there’s a better way to solve this then be my guest!

I hope this will help and that you can understand what I’m trying to achieve.
Thank you!

Early 2021 clean-up: duplicate