[CONTAINS MILD 1030 SPOILERS]
Well, I'm here with a another crazy thought process. Now let me explain my headcanon (the way I interpreted how it works) about Awakening in general, and why I think Luffy has already done so.
Also, this post's thought process will be weird and allover the place, resembling my own, but (hopefully) make sense at the end (and not need a reread to actually understand a thing.)
This first came to my attention when I was talking about Luffy's gears with my sister, and I explained why G2 made the most sense and G3 made the least (G4 being in middle). Then it turned into a talk about Awakenings, and I thought of a theory: what if Katakuri didn't get the Logia properties right from the get-go? I decided to make some Paramecia categories: Maker, Mutation and Hard.
Maker let's people make stuff; String, Mochi, Cracker, Candy, Magnetism etc. (I will return to that last one in PS).
Mutation turns someone into stuff; Rubber, Mochi, Chopped parts ect.
Hard has strict rules; Mirror, Jacket, Book etc.
We had 2 Awakened Paramecias prior to 1030, and I start with them.
(A/N: these are by no means tested. Only tested enough to make this post)
Doflamingo makes string. His Awakening turns things into string.
Katakuri makes and is Mochi. His Awakening turns things into Mochi. And based off of this theory, also himself into Mochi. To be more precise, controls the Mochi he is made out of.
Kidd makes magnetism. He makes other things magnetic.
So, my point is, Luffy can control the rubber he is made out of. Similar to a lot of theories, but is based off of something else.
Noticed that I added Mochi to two different groups? That is because of his Special Paramecia standing. So, I'm saying that he mimics the properties of a Logia with his Awakening. He shares a group with both Doffy and Luffy, one we have seen and one we haven't noticed. Doffy is obvious, so Luffy is the one that changes his own body.
Now I explained where this crack headed theory came from and the weird thought process, let me dive into the evidence (also, Kata and Doffy were my main pillars while making this theory.)
As seen in 1030, Awakening takes a lot of energy, and mostly reserved as a safety net or a trump card. This point is supported by Chopper going Monster (which is another theory but who cares), Doffy using it as a last resort and Kata using it when the last clash began (iirc. It has been a while since I watched tag fight).
And what is common when Luffy using a Gear? Tiring out before you can say "Gear".
We also seen that neither Doffy nor Kata thinks it as "unuseble in real combat" when Law and Kidd agree on it. That is related to experience.
When Luffy had to use Gears in pre-TS, it tired him out really fast and was usually a last resort. Now, it is his main fighting style. I doubt Kata and Doffy used it as much as Luffy (if we consider this theory true) as they had other choices. Luffy didn't.
Now, to the real meat of it.
G2. Makes sense, as it increases the blood flow and the energy production, thus more strength and speed.
G3? Makes absolutely no friccng sense. When you fill a thing in a air, it becames ligher (less dense) instead of heavier. And it increases the surface area, so that same mass can't even as mu h damage. but, if he could somehow turn that air into rubber, as it was inside him, that would drastically increase his mass. Thus, makes sense. Oda doesn't just pull a random thing and go along with it, he makes it make sense. Same thing goes for G4. Inflated muscles, not worth much. Increased mass of muscle? That is terrifying. This also explains why he got tired of using G3 (not G4, by that time he was pretty used to it so the problem was haki resources) and G2 had a more biological reason (using more nutrishians in less time).
And why using G3 made him shrink. Seriously, why does no one question this? If this theory is true, then it means he released more than necessary back into air, thus reducing his original size, then regained it back subconsciously. And during the time skip, he learned to control it so it doesn't effect him anymore. And never had that problem with G4 by that reasoning.
Well, that's as much as I remembered folks, I hope you managed to read this. And please Dot and Thagiftedkid, these mild spoilers don't warrant a delete, right?
(PS: I consider Kidd's fruit to be a Maker type, he makes magnetism in certain areas of his body and can switch it off/on. And also he can make other stuff magnetic (ie: BM)).