When you said "patterns" I was expecting a little more than just 8 point blocking or running through the different ways you can punch someone. But then again, how long does a routine have to be before it goes from just a drill to a pattern? 19 moves?
I can understand your question but I can't really say what the difference is. Patterns or drills it does not really matter what you call them. GM CK Choi wants to focus the attention on practical fighting techniques. He wants to make sure that people who study original Tae Kwon Do have the tools they need to be successful both in a tournament and on the street.
These are what he calls sparring patterns and he learned them from his primary instructor and he used them and still uses them today. They include all stiking techniquee hand, elbow etc and all kicking techniques (not seen on the videos). for example the equavalent for a front snap kick would be something like. Stationary, shuffling, sliding, jumping, long jumping, high jumping.
I think his concern is that students and instructors spend more time working on the techniques that are more likely to actually be useful during a fight.
It is not that he dismisses the importance of traditional patterns from an art and an exercise point of view simply that there should be a greater focus on the fighting techniques side of Tae Kwon Do