I undid all the edgings and re-worked them.
It looks much better than before, don't you agree?
I made button holes in simple Tunisian fabric, by skipping a vertical bar going forward, and adding a chain on the way back. I placed the button holes so that buttons are next to Tunisian stripes, not the broomstick lace stripes.
I am so relieved that all my efforts did not go to waste.