Well I have thought about using a multiple zigzag stitch (three stitches in each direction) because that would be similar to what you're saying, and it would also echo the whole zigzag motif of the quilt. Also, with a wide stitch like that, you get more bang for your buck (cover more area with each line of stitching) than with straight stitching and maybe any wobbles in the stitching lines won't be so noticeable.
Of course this is only my idea never having DONE this before!