Being a beginner quilter, I have the same issues with starting & then not liking the quilt. I have found that adding a sashing between blocks, turning some of the blocks on point & adding setting triangles or using a totally different fabric for the outside borders can make all the difference in the world. Also, who said what you have done has to be the center of the quilt? What could you do in the center & then use the blocks you have as part of your border? So many ideas....that's why I don't get much stuff finished. lol I'm still thinking & planning.
Please post a picture so these folks can give you some suggestions. I have loved seeing what they come up with. It has helped me a lot.