Orson, my solving experience was the same as yours - I didn't get, didn't even look for, the words that moved in the Down clues. I don't feel I missed out on any cleverness - I quite like the idea that I beat the setter in one way! I prefer puzzles that work all the way through - do this, then this...and that'll lead to the final step. In yesterday's crossword, the letters from the Down clues was just a complication.