I must say that if you have heard the Watt Puppy series in a way that shortened the height of images, you did not hear them properly set up. I too am very sensitive to speakers that foreshorten image height. (I know that for some listeners image height is a nonissue).
Indeed, that very problem prevented me from trading up last year to a $50,000 pair of speakers from a competing well known manufacturer which exceeded the performance of Sashas in other important respects. I stood up and the sound was almost completely below me. I agree that this can destroy the suspension of disbelief. Certainly line source speakers are the best at image height and, of course, nothing beats the placement of drivers in a tall speaker. But for a speaker under 4 feet tall, the Watt Puppys and Sashas project image height as well or better than most.
Of course, my definition of proper image height may be different than yours if you believe the singers voice should be 5' from the floor in you listening room.