I do think there aren't many great safeties coming into the league today. I considered William Moore a top 15 pick in the '09 draft, and I think besides Eric Berry and Earl Thomas, there haven't been any better safety prospects to enter the league since then.
You have a lot of good safeties in the NFL, but few great ones now that older vets like Polamalu, Ed Reed, and Adrian Wilson are on their last legs. This year may be the last year for all 3 players in the league. And besides Earl Thomas, Eric Weddle, Berry, and maybe Jairus Byrd, what other really good safeties are there out there? Moore is good, but he leads a group of good safeties, not great ones.
I think there are a number of positions that college football is struggling to produce top players at anymore. I think the OL falls into this group. TE too. If Tyler Eifert doesn't turn into a really good TE, then that 2010 class will be the last time we've had some really good TEs enter the league. And with Hernandez done, Gronk and Moeaki unable to shake the injury bug, Gresham just being OK, what looked like a monster class a year or so ago, may just wind up being JImmy Graham and Dennis Pitta 5 years later.
"Vincere scis, Hannibal, victoria uti nescis" -- Maharbal, 216 B.C.E.