I would leave it as is as long as it is your own. We all have made quilts that aren't our favorites at first, but after it is all quilted & finished, it isn't as bad as we thought & you will love it just the same. Feels like I rambled but you know what I mean! lol

Once it is quilted it will have shadows, raises, dips, and all of those things change the tone of your white anyway. Don't change it. I don't like the thin fabric.