I have no doubt that Smith isn't hiding anything and that Miami has been in contact with Alabama all year. I see Smith as Occam's razor. He's been the obvious target for a long time. And just like when Tua was the obvious target, the team has been keeping tabs on him all year. I recall when Flores was asked about Smith's weight at the Senior Bowl. I thought his reaction was quick and genuine. His face and tone seemed to say, 'anybody who worries about that is an idiot and doesn't understand football'. His words matched the sentiment too. He stated, "if you can play, you can play".
Although I do think that Waddle's speed and reported NextGen stats as well as Pitts freakish unicorn ability make them compelling considerations as well.