What the Faulk
You'll know when you go
I don't think trading back for Fleury is going to be an option. I truthfully don't know the exact number, but I would wager there haven't been many drafts in the past 15 years where 2 defensemen at least didn't go in the Top 10 picks. Not enough incentive to jump back only 1 or 2 spots and risk losing out if you're that keen on him. He'll go Top 10. With the defense class being so relatively weak this year on top end talent, it raises the price on the two available. In my keeper league draft we had Ekblad 1st overall, Fleury 10th, and the next defenseman at 25th in Travis Sanheim. Fleury and Sanheim both probably take small jumps up in the real one.
Since 2002, there has been one draft with fewer than two defenseman in the top 10, oddly enough in 2006 when Erik Johnson went first overall. Only one other time has there been fewer than three taken: 2010 when Erik Gudbransson went 3 and Dylan McIlrath went 10.
You're probably right in that trading back probably loses Fleury, but I'd love to see that much talked about swap with Anaheim and have a range of players they'd be willing to take.