Say we do end up with the sixth and twelfth picks.. is trading those two picks for a first, second, or third pick worth it?
Yes, and it's not even debatable. The history of success with the first 3 picks is generally pretty good. The last 10 years:
#1: Wall, Griffin, Rose, Oden, Bargnani, Bogut, Howard, James, Ming, Brown, Martin
#2: Turner, Thabeet, Beasley, Durant, Aldridge, Marvin Williams, Okafor, Milicik, Chandler, Jay Williams, Swift
#3: Favors, Harden, Mayo, Horford, Morrison, DWill, Gordon, Anthony, Dunleavy, Gasol, Miles
About 6 outright busts in 30. About 10 bona fide superstars depending on your definition. Plenty of overpriced disappointments, but serviceable players.
Contrast that with picks 5-7:
#5: Cousins, Rubio, Love, Green, Shelden Williams, Felton, Harris, Wade, Greek Stiff, Richardson, Miller
#6: Udoh, Flynn, Gallinari, Jianlian, Roy, Webster, Childress, Kaman, Wagner, Battier, Johnson
#7: Monroe, Curry, Gordon, Corey Brewer, Foye, Villanueva, Deng, Hinrich, Nene, Eddie Griffin, Mihm
Outright busts could number 8-10 depending on how you count. Superstars drop to 4 if you include Gordon, 3 if you don't.
Moral of the story is move up. Problem is everybody in the Top 3 knows how crappy this draft is so they won't likely take a straight 6 and 12 for 2 or 3. What you don't do is delude yourself into thinking you're going to get 2 solid players at 6 and 12. The overwhelming odds are 1 will be a stiff.