Rubio was Spain's most consistent player in FIBA and one of the best defenders in the tournament. In their only lost game against France, he was the only Spanish guard who was able to penetrate and dish, while the others simply got pushed out of position by France's quite physical defense.
Some players on the roster, we haven't mentioned: Mo Williams, Chase Budinger, Shabazz Muhammad. Mo is a pretty good veteran to have in the locker room and on the floor, Budinger is all right as 9th-10th man on the roster, and I'm still intrigued by Shabazz.