Hi Sam...
Miniature - you're going to hate me for this! DOF and lighting on the coins works a lot better for me... although it may well be more the DOF and having the coins (nearly) in focus - although the nearest one is just out of the focal plane I think. The direction of lighting really brings out the writing well, which is what you want - at least what I want. Now comes the but...
The high up lighting you've used to good effect with the coins has, in my opinion, flattened the horse's shape. Your previous side lighting, even though softer (with more of a falloff on the shadow, for example), gave shape and definition to the horse's flank and musculature - on this one it's a bit too even.
My "solution" would be to keep the arrangement as you have it, but move the light to frame right, basically glancing along the direction of the coins. This would give them similar definition in terms of the writing (albeit from a different angle) and would allow that stronger side-lighting to bring out the shape of the horse's flank. Only downside is you'd really stretch the nice shadow you have in this (and the previous one) and depending on how hard the light source is, you might more or less lose it (point source to keep it, window or softbox to almost lose it).
Sorry for being picky!!
Happy is a beautiful shot - nice leading line behind Lucy and a fab expression you've caught! The only thing I don't like is the processing where you've softened the sides. Ironically it distracts me from the really lovely subject rather than concentrating my view as it "should". Easily fixed (if you wanted) by taking it back out again, though