Here's my two cents. The yellow vine print and the red and green triangles just don't fit with the traditional applique center and the tan and brown blocks. It is like you have two very different quilts mixed up.
I think if you try some reproduction fabrics that are in cream, dark red and dark greens it might work better.
The tan and brown blocks are very eye catching, as is the center. It looks very traditional that way, and the brighter colors disagree with it.
That is my opinion anyway!