She's a fusion that we can actually understand from a fusion's perspective!

She can't be, not according to you. If she's not a separate being she can't have a unique perspective. Once again you're contradiction yourself in your attempts to make a stillborn point.

That is hugely important to understanding how a fusion works, even if its not gem to gem. If the process is the same, which it was,

It could not possibly have been the same process. Connie and Steven are flesh-and-blood humans, only one of whom possesses a Gem. Gem fusion normally involves the merging of disposable, artificial constructs, all of which possess their own Gem. Again, Steven is canonically the only Gem-human hybrid in existence, and Stevonnie is canonically the only hybrid-human fusion to have ever existed. She is canonically unique.

that shouldn't make a difference in understanding how a fusion operates internally.

You have been arguing that a new entity is being created, so why would the presence of two gems change that something different exists?

Because there are normally two Gems, not a Gem and an animal made of meat and blood. And I never said that a new entity was always created, only that it clearly was in the case of Garnet and Sugilite, and probably in the case of Opal.

She also states that she's never alone, and that WE already love you. Inconsistent at best.

99% of the time she refers to herself as I.

Pearl's analogy only alludes that it is more complicated than being mashed together.

No, it directly invokes a substance that has properties not found in either component, and that lacks properties of those components.

And I'd think Garnet has more experience being able to describe what a fusion is really like.

No you wouldn't. You've been steadfastly ignoring the vast majority of Garnet's dialogue regarding herself and Sugilite. You're only deferring to her experience now that you've managed to cherrypick a single sentence that, on the surface and taken out of context, seems to support your point.