Try to look for similar blocks. What I mean is put a 4 patch with another 4 patch or 8 patch. A pin wheel is a 4 patch and will bisect your 9 patch.
Get out your graph paper and try to draw it out, it doens not match and looks jarring.
A snowball would look great with your 9 patches, you can adjust the angle so that everything comes together, as you want.