It is a gorgeous top, and good for you for figuring out how to fix the mistakes in the pattern. I agree with Marcia who said that some black all around would make it float. Then maybe a couple narrow borders if you want to finish it off.
I was watching the quilt show yesterday, when it was free, and learned that sometimes the person who writes up the pattern directions is not the person who made the quilt, or whose name is on the pattern. Maybe that's what happened here, but it's still no excuse.
I forgot to say - your piecing is so perfect, I thought I was looking at an EQ6 design at first. Wow! Good job!