Here's one other idea besides remaking if your machine has a zig zag stitch you could couch stitch some yarn over the seams, greys or blacks that look good between the two colors. That way it fills in the space w/o a heavy zig zag stitch.
Well I'm late to the party, but have had an exhausting read through your thread! lol I was rooting for the pink paisley, the hearts and rabbits were a perfect combo, the dark blue was a great match for the manly log cabin, and the 3D was too cool. I know you said you don't like straight line...