Hi Carol,
Here's what I came up with for a possible design that could be done with less quilting (although I really like Peggi's quilt, too!):
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It looks like your hexies might be 4" so I did one of the heart-flowers with an extra row of smaller petals in it. Draw it out on your quilt & see whether you need some extra quilting in there (if they're 4", you almost certainly will). I put leaves to fill those white spaces -- be sure to leave room between the hearts to allow for those leaves to properly form (you know how I've learned that). Then 2" cross hatching to fill the main open space & heart inside the half hexies to add unity.
2" is generally enough quilting that it could be washed every week in COLD water on the Gentle cycle & on LOW heat (no fabric softener & no bleach at all -- not even Clorox 2 [you have to tell non-quilters this stuff]) once a week every week for 20 years -- however I haven't studies poly batting so I don't understand exactly how it launders except that it does lose some of its puffiness over time. But as long as it's laundered with a little bit of care, it should last for many years to come.
It wasn't clear whether it's your baby or not. If it is, you're good to go. If not, based on experience -- I sell baby quilts, I'd check with the mother about the polyester batting. I don't even offer poly anymore because every single client (grandparents) would find out that the parents wouldn't allow synthetic bedding near their little one even for tummy time. I'd hate to see your quilt relegated to the closet (it's happened to me). If the mom's okay with it, you're all set. It's a sweet little quilt that I'm sure will be well loved for many years to come!