@jhughes I don't like either/or approaches. Either lots of reps longer/slower never faster/shorter OR pound the wall? I have seen guys run a pass forever, trying to get it perfect before moving on, and all they seem to do is become one of the best skiers ever at that pass, same pass, year after year. I have also seen guys just go out and bang away at their toughest pass but never seem to get through it, same pass, year after year.
I believe a mix is best, with a purpose. Do your usual 15/32, 15/34, 22/34, but each one back to back. Then a crack or two at -28, and back to 22/34 to finish. But work on just one thing, say handle in all the way out till the boat takes it, or not pulling till the boat pulls you. Perhaps drop the speed on -28 to 33mph but no more, timing and feel too different otherwise. Perhaps get a rope with a -25 loop (and a -30 loop for when you need that one).
Keep a book. Record every set, how it went, what was good. Judge success on accomplishing your goal that pass, like keeping handle in. Review before you ski so you have a focus from the first start on what you want from the set. Once you have identified your keys do a set or two of multiple15/34 or 22/34 running them all and doing your keys, doesn't have to be perfect, just running them. Then probe your limit, learn, write it down, adjust, go again. The buoys will come.
You say "So, was this morning satisfying? Not really. Educational? I think so." You learned something you didn't know. That should be satisfying. Take what you learned, apply to the next set, go from there.