RyNye brings up another great point that throws yet ANOTHER variable into the mix when it comes to tanking.
Last year's NBA draft was also pegged as pretty weak. Instead, in addition to Davis, Beal, Waiters, Lillard, and Barnes all had solid years. Drummond showed MASSIVE upside that had some people raving he's the next Dwight. MKG had a decent year while showing flashes of his potential. Harkless, Nicholson, Fournier, Sullinger, and Ezeli all carved out solid roles for their teams.
Then there was the Blake Griffin draft. A lot of people were down on that draft outside of Griffin, but that produced guys like Harden and Curry, and a plethora of very solid players right now. Ironically, Thabeet was one of the most hyped players of the draft, and ended up being one of the biggest busts.
The college season hasn't even begun yet so many people are quick to call these players franchise changers already. Shabazz Muhammad was the #1 recruit out of high school last year and everyone though he'd easily be the #1 overall NBA pick this year, but we all know what happened with that.
Don't get ahead of yourself. The lottery is a huge gamble.