Wow bigger response than I expected.
My stance on the exercise remains the same: it's useful. Maybe not, as some have pointed out, if you're looking at the exercise as practicing the encoded techniques which direct the sequence, but it is useful for thinking about what you're going to do next, paying attention to how you move your body, and really picking apart each thing that you do. Another exercise my sa bom nim has us do sometimes involves doing our advanced basics backwards, which are typically three moves in sequence, such as hadan mahko, tora choong dan kong kyuk, sang dan mahkee. That's the most basic one of the set, and the easiest to do backwards, but as you go through, you really have to think about what would make sense for the transition from one move to the next, moving backwards. All of a sudden, moving forward and blocking is not dodging to the side and deflecting but stepping back to avoid a strike and deflecting. Stuff like that. Really makes you think about what you do and how you move.
Then there are times when we'll do forms, but facing a different way in the dojang than typical. A big trap some beginners fall into is basing "what to do next" on "where am I facing in the room." When you get out of that familiar setting, that becomes a problem. I often practice hyung in different orientations and even, as someone else pointed out, with the opposite side. In fact, I've been doing that more lately, since it helps, when going through a form with a younger person, to act as a mirror, especially for hyung like the keema hyung (read: naihanchi), where you can just stay right in front of the person and act as a mirror until they get it down, at which point you step away and make them do it on their own. Either way, practicing the mirror version of a form makes sure you're not just practicing by rote and "going through the motions."
Good comments all, and thanks for responding!
Tang Soo!