Until recently I only used my walking foot for quilting, sewing on binding and making bags with foam or multiple layers of batting. One day on a hunch I used it to sew my diagonal seams on 4 at a time geese and 2 at a time HSTs. I noticed a big improvement. I think the fabric had been stretching ever so slightly as I sewed along the bias when I used a regular foot. When squaring up the blocks the diagonal seam would not match the diagonal line on the ruler, mainly at the starting and ending points. Just a smidge but really annoying. Using the walking foot has pretty well eliminated that problem and I will continue to use it for any bias seams as I am quite pleased with the results.
As a footnote I did mess around with the presser foot tension before I went to the walking foot but that didn’t solve the problem.