I really think a nice 12 inch square would make a nice motif. Before you say anything, I know that a 12 inch motif constitutes a doily, but think how much faster it would work up and how many fewer ends there would be to deal with. I can easily do a 12 inch doily continuously climbing from row to row. Actually if I design 2 different but similar 12 inch motifs, with matching picots on the last round, I could alternate them for a very interesting effect.
Does anyone else get bored with tatting the same thing over and over again? I tatted a vest using a simple one round motif and there were so many of them that I barely got it to the wearable stage. So much repetition nearly drove me bonkers.
Of course, I could also design the shawl as one long rectangle. Imagine a whole shawl with only 2 ends to hide!!!!