You can not pick and choose the bits you like from various ones and hope to have a reliable and repeatable solution. Essential Use Cases are designed to be used as the input to an Interaction Analysis and Design process as part of the whole Usage Centered Design methodology . If you're not doing all of this, then my argument from February still holds true. The people problem is even more acute with Analysis. If its more than a handful then you are truly lucky.
Analysis is hard and good analysts are rare.
I believe that teams could learn and develop these skills, particularly if they hire a guru such as Larry Constantine to help. However, for many teams around the world, this will not be possible. The chance, then that their Essential Use Cases are properly developed, is slim. The term Use Case has now been over used in the industry. Many authors have produced their own variations.