Well, it's not just that easy to get a top pairing defenseman. Florida won't pass on Ekblad, they have incredible depth down the middle and won't want to draft another center. Besides Ekblad there aren't any NHL-ready top 4 defensemen in the draft, unless there's a miracle in the later rounds. It's not easy to get a top pairing defensemen, Oilers should just work with what they have and maybe draft some of their top6 players for a solid top 4 guy? The upcoming UFA market isn't looking too big on defensemen, the best guy for Edmonton to sign would probably be Andrej Meszároš, who isn't bad, but isn't THE guy like for example Chris Pronger was.