When is Enough Enough, or Not Enough?

I just finished binding a quilt that I am super excited to have finished!​

​The top is actually hanging over the fence - must be longer than 6'.

​The top is actually hanging over the fence - must be longer than 6'.

​full length exposed

​full length exposed

This is a quilt top that I began more than 2 years ago, but because it had no specific destination or due date I put off the finishing. But I was excited to try another quilt with the serrated edges, like my teal monochromatic one. However, this time I took a short cut that may or may not prove problematic... I did NOT cut my binding on the bias. 

Now, for those of you less familiar with sewing and quilting, one of the main advantages (or disadvantages, in many cases) of cutting on the bias, meaning at a 45° angle to the weave of the fabric, is that the fabric gives much more, enabling one to work it into curves. Or perhaps concave corners.​ However, because of the print I chose for my binding added to the fact that I really really really do not like cutting and piecing bias binding, I skipped that very wise step and worked with a straight-grain binding on those pesky edges and corners. 

​And I succeeded. At least, it's finished and bound.

But is it fully quilted??​

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I went into this with a plan. And I followed that plan, but as I came to the end of my quilting, I was left unsure whether it is quilted enough to keep it together in the long run. I think I managed to get my quilting lines often enough to satisfy the requirements on the batting package, but I don't always take those for their word.​

What do you all think??​

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​Would you try and add some echo quilting in there at various places, or perhaps something a little more free-motion and organic going through those open channels? I don't think I've ever considered changing the quilting on something AFTER it's been bound, but this keeps talking to me as though it's just not quite finished. But I'm ready for it to be finished. What voice would you listen to?