i'm not so worried about our lack of success drafting in the second round (or lack of drafting in the second round period) because how many teams can say they've actually turned second round picks and undrafted signings into effective rotation players? What happened in San Antonio with Ginobili and Parker can be attributed to incredible scouting and a fantastic system, but it's also nothing short of a miracle. Two non-first rounders to become all-stars and core pieces on a near-dynasty? It just doesn't happen.
Two teams that built through the draft - OKC and Atlanta. Neither team has a core player from the second round. Miami, LA, Chicago (though they signed Boozer), Orlando, Dallas (save for Barea), don't rely on second round players. Lightning struck twice in San Antonio. I personally don't care for second round picks that much, use them to sweeten the pot in a deal and hope someone else bites on a 1/1000 chance for a diamond in the rough.