Correct, the CBU-25 was the replacement of the CBU-14, according to my notes. due to the -14's high failure rate. However, cluster bombs up until the 2000's had failure rates between 30-70%. Mostly due to the mass-produced natures of the submunitions, the inherent flaws of the designs and less focus on the consequences of their use. The piezoelectric fuzes were quite unreliable, along with the problems involved with deployment from the main canister. Damned effective piece of kit though. If you want a large company to regiment sized force neatly destroyed, the CBUs are the way forward.
I won't post my dissertation on the subject, promise.