i think the floral backing is PERFECT! busy is good for kids quilts!
as for the plates- they (could) be considered usable for male or female...but they are not really masculine looking- they are very nice and the colors work with the back.
if you want to make it more feminine you could try a final border with the brighter fusha color from the backing- but really it does not look masculine to me- and if you quilt it with flowers & butterflies it will really look 'girly'
very nice===and isn't it great how kids will push us out side our comfort zone?