Please explain in - in DETAIL - how a hybrid form between Luffy, a human, and a human would look like.
Luffy has the form of a god that uses Rubber as a power (and is a sun god for some reason). His hybrid form is the human-rubber guy. What part of that is hard to understand? He is unable to turn fully human because the fruit was created as a paramecia. This was a plot point multiple times (including the fact that he was still rubber even when the fruit should be inactive).
You misunderstand again. Chopper is a reindeer with a human fruit. The example was a human with a human (or humanoid) fruit.
The fruit was designed for Chopper to exist as a character. There's no misunderstanding. We see the hybrid every time Chopper uses his fruit. Your fanfiction about some other possible user does not matter.
Zoan fruits having effects on base has been the case ever since then. Its not something exclusive to Luffy and the Nika fruit.
Manga explained that it was the effect of the mastery of the fruit. Sentience is something that plenty of animals in One Piece have, Chopper was different from normal reinders since his birth. EDIT: Since I know that you are gonna lie and use your fanfiction this is the page in the manga about Chopper
Notice that it was never stated that the human fruit gives him extra intelligence. The fruit actually has a form with increased intelligence (his Hybrid or brain point). So, Kaido fruit does not gives scales without mastery (see Momo) and human fruit increased intelligence is stated to be in brain point (see chopper).
Again, follow the manga and not your fanfiction. The manga clearly states that the characteristic that classifies a fruit as zoan is the ability to change forms.
Post a panel of the manga where he is 100% human after eating the fruit or shut up.
Same as for Chopper and Kaido, some properties of his Zoan fruit remain.
This is fanfiction. Kaido's fruit does not give all the users scales, we have momo as proof. Chopper is your fanfiction.
You can not possibly expect Oda to call the fruit a Zoan right from the start.
If he planned the story from the start, yes- he should have. But the point of the rant is that Nika is a retcon.
Except any mythical Zoan because they make no sense.
Every zoan user is a zoan first and foremost and have extra powers. This includes the human budha fruit that is capable of turning into a human-Budha hybrid. The fact that the zoan user has extra powers does not change the fact that they can change forms.
The user is a fox that besides the fox form can shapeshitft to imitate the legendary animal. Still a zoan.
Dog fruit that has extra ice powers because this was what the god it was based had.
IDEM
Bi-idem
First, it's based on demoniac animal and so has some demoniac powers. Second, you are assuming that Saturn is a zoan, something that was never stated and you are assuming just because he was a normal human and changed forms to a animal. A characteristic of zoans that is shared among them- except of course, Luffy.
The Nika fruit is not any weirder than all the others.
Except for the fact that is not designed as a Zoan, does not have the zoan strengths and was created to sell merch and try to salvage a shit arc