Quilter 65, didn't know about your eye surgery, I hope you'll be able to see much better real soon.
For me the problem is that the colors all mesh together and there isn't any break. I'm probably the last one to give advice or help too because I'm a bold person with colors & ideas. I like to mesh things, add bold colors, that others would never think about doing. I think that even a different color break between those two borders would set them off. Maybe even another pieced border small like 2 1/2 or 3" border in lighter values of red & green would be nice. I really like what you are doing, all these medallion quilts we all are doing are just wonderful, so many different designs & ideas, some work really great, others are okay, but we all have our own ideas of what we would do to each & every one of them, that is what makes us all so different and our quilts one of a kind.
You will know what you do is right, because as you said if it feels right, it's right. It may take me a few weeks to plan, stare, change my mind, until something hits me that says "Hey I like this" before I take that jump & add to my medallion quilt. This is how we all learn, learn colors, ideas & what works for us & what doesn't. So don't jump until you think you like it, & of course feel free anytime to post pictures & ask for suggestions. I'm sure there are many others with different ideas than mine, YOU ALL OUT THERE, do you have any ideas for Quilter 65.