I have done bed size with a technique I developed called Watercolor by Number. Watercolor by number uses only 10 floral fabrics or less and combines them with a traditional quilt pattern. I have had one student who put a light border around the watercolor crucifix and it looked great. I have flannel design walls. White flannel is important.
People try to use colors or the back of a table cloth- and it confuses the design.
I just saw your cross wallhanging. It's my best selling pattern. I used to hand quilt everything, but time does not allow much of that anymore. I do like to hand quilt in the light areas of watercolor quilts where it can be seen. You don't want to use mini prints because they won't blend in with the other fabrics.