Here is something radical...fold the top so the inside corners of the X's touch and move the seams in both directions so you are creating a checkerboard. I have not spent time getting out my drafting paper to see if this is impossible, but off the top of my head it seems doable? Then a bold border with something possibly flowery or childlike and then a binding. If the blocks are off a bit you can likely fudge it enough to make this work and then some baby inspired quilting will hide the rest?