The problem for the Spurs back-up point guard will always be that this person plays such few minutes. No one wants to come here and play 10 mintes a night except an old veteran who has done his time and wants to win a championship. A young player wants to get onto the court and get some experiece. Also, the Spurs will not justify spending Speedy-type money on a guy who plays so few minutes. I have proposed all along the use of Brent as the back-up point guard and he does double-duty as the fourth swing man, in case Manu or someone else gets hurt or there is foul trouble. You "justify" his salary because he fills two needs with one player.
I adore Beno but for his development it might be better for him to go elsewhere where he will get onto the court. The guy is the best passer on the team and really knows how to run an offense, given the opportunity. One season as the third string point guard was OK, but if the Spurs are not going to play him this year, they need to trade him somewhere where he can get some playing time.