Well, reviewing how Luffy defeated Cracker with Tankman, which to me always made almost no sense, as Luffy absorbed/sucked in with his large mega-body Cracker lunging into him a 2H sword - It had to be one of the couple of hints Oda gave that Luffy's body was not normal, only doing what it was doing through his imagination and will-power. Doflamingo made a comment, but that sort of made no sense. Unless it was because he enlarged his body.
Maybe head-cannon, but maybe when fighting various people like Magellan, where he comments his mental strength was insane… perhaps it was that animalistic/zoan-like spirit that made Luffy fight like crazy. Sort of how the awakened Zoan users in Impel Down were crazy brutal. But at the same time, Luffy made plenty of people laugh with the way he fought, being ridiculous. So that tied in nicely with the final awakening
I have come to actually appreciate his awakening abilities thus far (I'm waiting for more). I just wish there was an additional one or two hints that something was abnormal about his fruit abilities. I can even dismiss easily the arguments that the Gorosei should have killed or captured Luffy already if it was that dangerous of a fruit (in their perspective). I find their attempts already to be adequate given their short time in the Grandline/New World, and the 800 years of non-threatening awakening of the fruit.
While the WG deems this specific fruit dangerous in their historical perspective, it doesn't necessarily mean no other fruit can be dangerous to them. I'm almost convinced that Kaidou's fruit is classified just as dangerous, they just can't do anything about it. The WG's attempts of capture, failed execution and attempts to replicate the fruit must mean they absolutely wanted it just as much.