First....thank you for sharing your journey with this quilt. You have made so many beautiful blocks. Even though it pains me to say this, I think I would remake Block 30 and use this one to make a pillow for someone to love. Or, maybe try straightening out the block first. But maybe an experienced long armer will chime in and suggest another way to smooth out the background. But, then I think.....what if the next one comes out the same? Tough decision.